FDR, of course, was re-elected by a landslide. Literary Digest is long dead. Polls, still in their infancy in 1936, are thriving. It's hard to imagine modern American politics without them. Candidates use polls to monitor how their campaigns are faring, and to find out which buttons they might push to win your vote.
Polls are controversial.
Some people say they discourage good potential candidates with low name familiarity from running for office. Others say polls may measure public opinion, but often don't measure the intensity of that opinion. And of course nobody knows how much those responding have thought about the candidate or issue. Reading polls intelligently Public-opinion researchers know much more about how to conduct a poll now than they did when the Literary Digest staged its spectacular bellyflop. Still, polls are imperfect tools, subject to manipulation and misinterpretation.