In 1944 the war is not going well. Having thrown back an invasion in late 1943 Hitler has made peace overtures to the US to drive a wedge between the Allies.
Republican Lindbergh, who won in 1940 on an isolationist platform (which he has adhered to despite Pearl Harbor's turning American sentiment against it, and him) is known to look on this with favor. He is also widely seen as having crippled the war effort in the US by several underhanded means. One of these is by strongly opposing the employment of women to replace men in American factories. Despite this, the practice has become widespread.
The pro-war Democrats in 1944 seize on the idea of running a woman as a symbolic representation of 'Rosie the Riveter' and Amelia Earhart is convinced to personify the working woman. Using the strong tide of pro-war sentiment combined with the widespread use of a new political idea in a drive to register women voters, she gains victory in the 1944 election.