The oldest Gen-Xers were first elegible to vote in 1982. They were statistically insignificant in Clinton's elections. If you look at the population numbers year to year, you will see that they become more significant as the years roll by.
FDR was a disaster for the country, economically and politically. Without his big government meddling, the people of the US could have gotten the economy rolling again. As it was, the economy was restarted by the buildup for and during WW-II, in spite of FDR's policies. Democrats dominated the body politic for the rest of the century, the Democrat's pet projects generally produced dismal results. The post WW-II high was accomplished by the drive of the returning WW-II Heros, and during that time the liberals had to go along to get along. The real problems started in the sixties when the Boomers came of age.