The number of voting members in the US House of Representatives is fixed at 435. That was set by Congress in The Reapportionment Act of 1929. In addition to the 435 members representing the states, there are 6 non-voting delegates: one from the District of Columbia, one Resident Commissioner for Puerto Rico and delegates from the Northern Marianas Islands, the US Virgin Islands, Guam, and American Samoa.

The seats are apportioned to the states according to the population of each state, with every state getting at least one representative. Currently, seven states have only one representative. California has the most at 53. Every 10 years the Census Bureau provides the population numbers. Some states gain representatives and some states lose representatives but the total number stays at 435.
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Impeachment is the process used by a legislative body to bring charges of wrongdoing against a public official. Basically, it is the indictment of an appointed or elected public officer on serious criminal charges. The legal basis for impeachment is stated in Article II, Section 4 of the United States Constitution:

"The President, Vice President and all civil Officers of the United States, shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors."

The House of Representatives is the only body that can impeach federal officials. If a federal official is impeached, a trial by the Senate follows, which is where guilt and the potential removal from office is debated. It is important not to confuse impeachment with conviction. Impeachment is just a formal accusation; it is only the first step in removing a public official from office.

The idea of impeachment in the United States is usually discussed in reference to the president, although only two presidents have ever actually been impeached, compared to seventeen officials in other positions. Andrew Johnson was impeached on February 24, 1868, on charges of violating the Tenure of Office Act by removing Secretary of War Edwin Stanton from office. William ("Bill") Clinton was impeached on December 19, 1998, on charges of lying under oath to a federal grand jury and obstruction of justice. Both Johnson and Clinton were acquitted in the Senate. Impeachment proceedings against Richard Nixon had made it out of committee, but he resigned from office on August 9th, 1974 before it could be debated on the House floor.

Impeachment inquiries have been attempted on a number of presidents throughout the United States' history, including John Tyler, Harry Truman, and Ronald Reagan. In fact, every elected president since 1980 has been the subject of at least one Congressional resolution that suggested impeachment inquiries.

There are currently seven states that only have one Representative: Alaska, Delaware, Montana, North Dakota, South Dakota, Vermont, and Wyoming.

There are other territories that don't have any Representatives in the House, but they do have a different kind of representation—the District of Columbia, Guam, the U.S. Virgin Islands, the Commonwealth of the Northern Mariana Islands, and American Samoa each have one non-voting Delegate, and Puerto Rico has a non-voting Resident Commissioner that fills much the same role in the House. They can't vote, but they can serve on committees.

Representatives are allocated by population, which is counted every ten years by the census. This year, 2020, is a census year, and the House will be automatically reapportioned based on that data in 2023.

The two parts of the US Congress are The United States Senate and the United States House of Representatives together constitute that which is known as Congress, which is The Legislative Branch.

Senate - Upper House - currently 100 members, 2 from each state, serving 6-year terms with one-third of the members coming up for election during each two-year election cycle. The Senate is based on equal representation for all states. All states have two senators. The seats in the Senate were originally appointed by the State Legislatures but, with the 17th Amendment, were opened to popular vote.

House of Representatives - Lower House - currently 435 members, representing approximately equal numbers of citizens, serving 2-year terms with all members coming up for election each two-year election cycle. The House is based on population and the number of representatives is based on how many people are in your state. The seats in the House of Representatives were always filled by popular vote.

There are 435 representatives in the House, compared to 100 senators in the Senate.

This is the number reached when new seats were added in 1913, and the number was locked by the Reapportionment Act of 1929. From 1959 to 1963, there were temporarily 437 seats.

There are 6 other non-voting delegates. There are 5 elected 2-year delegates, one each from Washington DC, Guam, American Samoa, the Marianas, and the US Virgin Islands. Puerto Rico has a non-voting Resident Commissioner as a delegate in the House, with a four-year term. The delegates have committee seats in the House and have voting rights there, but cannot vote for a bill's passage on the floor.

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The reason for the limited number of representatives was to avoid a House so large that it would become unwieldy. Congressmen had every incentive to keep the number low to maintain the political power of each member. But the result has been that the size of constituencies has increased dramatically.

With one exception, the total voting membership of the House of Representatives had been increased after each of the official censuses from 1790 to 1910, at the time of the apportionments. Even though the apportionment is a Constitutional requirement, it was not done following the 1920 census. If it had been done as required, even without an increase to the total of 435 seats, 12 seats would have been transferred from one state to another, including an increase of three seats for California.

During the formation of the US Constitution the subject regarding the size of the House of Representatives came up. When a maximum congressional district size of 40,000 was proposed, George Washington, in one of his few comments regarding the debates, warned that 40,000 was too large and that 30,000 would be a more appropriate maximum. While the State of New York was debating whether or not to ratify the US Constitution, one of the delegates, Melancton Smith, warned that since increasing the number of Representatives would decrease the share of power of each existing Representative, they should not be expected to be inclined to do so. He went on to say, "It is, therefore, of the highest importance that a suitable number of representatives should be established by the Constitution."

The 12th proposed amendment of the Bill of Rights, the only one never ratified, would have established a maximum representation, and a minimum corresponding size of the House. Under that plan, the legal minimum number of Representatives in 2010 would have been 6189, including at least 12 for Wyoming and at least 746 for California. The average congressional district size is over 700,000 people, and the current population of the largest district is well over 990,000.

The current salary for all senators and members is $174,000. The salary for the speaker is $223,500 and the salary for the majority and minority leaders is $193,400.

Members of Congress are covered by the same retirement plans as other federal employees, the Civil Service Retirement System (CSRS) for those hired, or elected, before 1984, and the Federal Employees Retirement System (FERS) for those whose service began in 1984 or later. There are some differences in retirement age eligibility, years of service required, and contributions. Members elected after 1984 also participate in Social Security.

As of October 1, 2007, the average annual pension for former members under the CSRS plan was $63,696; for those under the FERS plan, $36,732.

"Frequently Asked Questions." Library of Congress - Thomas. Library of Congress. Web. 17 July 2010. .

Congress has the sole authority to decide how many Justices sit on the Supreme Court. The US Constitution does not stipulate the size of the Supreme Court.

Currently Title 28 of the United States Code Section 1 provides for 1 Chief Justice and 8 Associate Justices. Congress has changed the number of justices several times, the last time being in the Judiciary Act of 1869.

The Judiciary Act of 1789 created the first Supreme Court with six members, a Chief Justice and 5 Associate Justices. Congress adjusted the size of the Court a number of times through the during the 19th-century.

1. Judiciary Act of 1789: Court size 6
2. Judiciary Act of 1801: Court size, 5
3. Repeal Act of 1802: Court size, 6
4. Seventh Circuit Act of 1807: Court size, 7
5. Judiciary Act of 1837: Court size, 9
6. Tenth Circuit Act of 1863: Court size, 10
7. Judicial Circuit Act of 1866: Court size, 7
8. Habeas Corpus Act of 1867: Court size, 8
9. Judiciary Act of 1869: Court size, 9

After the election of President Ulysses S. Grant, Congress passed the Judiciary Act of 1869, which set the Court's membership at nine. This number has remained the same ever since.

In 1937, Franklin D. Roosevelt attempted unsuccessfully to expand the membership of the court to gain support on the Court for his New Deal programs. He proposed adding one justice to the Supreme Court for every member over 70.5 years of age, with the potential of adding as many as six additional justices, for a total of 15. Congress refused to pass Roosevelt's legislation; however, the President had an opportunity to nominate eight justices* to vacancies that occurred during his terms of office, which created a court more receptive to his ideas.