A congressman can't win. It has to be someone who has been a governor.

President Abraham Lincoln
Highest previous office: U.S. Representative from Illinois, 1847-1849

President James A. Garfield
Highest previous office: U.S. Representative from Ohio, 1863-1880
Presidents who were never Governors:
George Washington
John Adams
James Madison
John Quincy Adams
Andrew Jackson
John Tyler
Zachary Taylor
Millard Fillmore
Franklin Pierce
James Buchanan
Abraham Lincoln
Ulysses S. Grant
James A. Garfield
Chester A. Arthur
Benjamin Harrison
Warren G.Harding
Herbert C. Hoover
Harry S. Truman
Dwight D. Eisenhower
John F.Kennedy
Lyndon B. Johnson
Richard M. Nixon
Gerald R. Ford
George H.W. Bush
"It has to be someone who has been a governor." Or something very, very impressive. Good point. A single vote on an omnibus, and you get spanked both ways.