No. Several Presidents were governors or held other political office prior to becoming President. Some held no political office at all.
Justices reach the Supreme Court through appointment by the President with Senate approval
Vice President
A US president is elected every four years. The next Presidential election is in 2012. US Senators are elected every six years; however, one third of all the senate is up for election every two years. So in conclusion, every four years a president and a senator is elected. 2012, 2016, 2020.
Executive branch, Judicial branch, and the Legislaitve branch.
To take over the president if he dies.
To limit the presidents power
the President pro tempore of the Senate
The Senate is the only house of Congress that has the power to approve presidential appointments.
The Vice-President of the United States.
vise president of the senate I think
to decides whether a law is Constitutional , proposes that when a justice reaches age 70, the president should be allowed to add another justice and get senates to approve presidential appointing
Impeachment could cause an official or The President forced to leave office.