 The survey finds widespread discontent with both candidates. Nearly half voters, 47 percent, said they would replace both men on the ballot if they could. Fifty three percent said they aren't enthusiastic about anyone running for president. But but the enthusiasm for Joe Biden is non-existent, non-existent. Seventy six percent of Democrats say Joe Biden is too old to run this year of Democrats. Two thirds of Democrats would replace Biden on the ballot with another nominee.