Clinton is favored by 61 percent of registered voters who've seen or heard "Hamilton."
"You're seeing the first clear, visible corruption of the FBI," he said.
Clinton has 44 percent to Trump's 38 percent in a poll taken before Monday's debate.
Trump campaigns in Council Bluffs at 4 p.m.
Seven percent reported having lost or ended a friendship over the presidential race.
"She's the best we got," the singer tweeted.
Cristina Marcos 09/28/16 02:12 PM EDT
The vote on holding Bryan Pagliano in contempt won't come until after the election.
Sanders is stepping up his appearances in support of Clinton.
Dean implied Trump could be a coke user in a tweet during Monday's debate.
Hart will serve as his Connecticut chairwoman.