Background: Ford was born Leslie Lynch King Jr. on July 14, 1913, at 3202 Woolworth Avenue in Omaha, Nebraska, where his parents lived with his paternal grandparents. His mother was Dorothy Ayer Gardner and his father was Leslie Lynch King Sr., a wool trader and a son of prominent banker Charles Henry King and Martha Alicia King (nee Porter). Gardner separated from King just sixteen days after her son's birth. She took her son with her to the Oak Park, Illinois, home of her sister Tannisse and brother-in-law, Clarence Haskins James.
Context: After returning to Grand Rapids in 1946, Ford became active in local Republican politics, and supporters urged him to take on Bartel J. Jonkman, the incumbent Republican congressman. Military service had changed his view of the world. "I came back a converted internationalist", Ford wrote, "and of course our congressman at that time was an avowed, dedicated isolationist. And I thought he ought to be replaced. Nobody thought I could win. I ended up winning two to one."  During his first campaign in 1948, Ford visited voters at their doorsteps and as they left the factories where they worked. Ford also visited local farms where, in one instance, a wager resulted in Ford spending two weeks milking cows following his election victory.  Ford was a member of the House of Representatives for 25 years, holding the Grand Rapids congressional district seat from 1949 to 1973. It was a tenure largely notable for its modesty. As an editorial in The New York Times described him, Ford "saw himself as a negotiator and a reconciler, and the record shows it: he did not write a single piece of major legislation in his entire career." Appointed to the House Appropriations Committee two years after being elected, he was a prominent member of the Defense Appropriations Subcommittee. Ford described his philosophy as "a moderate in domestic affairs, an internationalist in foreign affairs, and a conservative in fiscal policy." Ford was known to his colleagues in the House as a "Congressman's Congressman".  In the early 1950s, Ford declined offers to run for either the Senate or the Michigan governorship. Rather, his ambition was to become Speaker of the House, which he called "the ultimate achievement. To sit up there and be the head honcho of 434 other people and have the responsibility, aside from the achievement, of trying to run the greatest legislative body in the history of mankind ... I think I got that ambition within a year or two after I was in the House of Representatives".
Question: What did he fight for

Answer:
of course our congressman at that time was an avowed, dedicated isolationist. And I thought he ought to be replaced.