A Representative is a Congressman and so is a Senator. They BOTH belong to Congress. Congress is the body of the TWO houses of the legislative branch. So, to answer your question there is no difference since they are the SAME person.
Another name for a US Representative is a Congressman.
Congressman Robert Wexler (D-FL) is the US Representative for Hollywood Florida.
a Representative or a congressman
Congressman Peter Visclosky is the representative in the U.S. House of Representatives from Gary, Ind
For a US congressman you can find out here: http://www.house.gov
A US Representative is elected to a 2-year term.There is no limit to the number of 2-year terms to which a US Congressman may be elected.2 years
Reid Ribble is a well known congressman who represents Wisconsin's 8th District. He is a Republican congressman and has been a US Representative since 2011.
The US Representative for the District of Columbia is Eleanor Holmes Norton. She represents the District but she does not have voting status.
Due to the relatively low population, there is only 1 US Congressman representing Alaska.
"United States Congressman John Robert Lewis was born February 21, 1940. He currently serves as the representative for Georgia's fifth congressional district."
In countries that use congress (instead of parliament), there are two houses (lower house of representative and upper house of senate) in which members of congress are divided into. However, the term congressman is used to describe the members of lower house of representative. House of representative represents the state (where each state may have at least one representative - some have one representative for each district) while senator represents the country (with 2 senators from each state). But congressman do have power to pass legislation that affects the entire country although it must pass through senate and the president. For the US, the powers of house of representatives and house of senate is described in Article One of United States Constitution. The senate and the house of representative have different powers.
Most of Arapahoe County is in the 6th Congressional District. See the related link below for the current US representative from the district.