"Something funny was going on with Trump last night," he said.
Jeff Weaver said Trump seemed "completely unprepared" besides trade policy.
Trump has long trailed Clinton in fundraising.
Rafael Bernal 09/27/16 03:54 PM EDT
Polling puts Trump a few points ahead of Clinton in the swing state.
The president will participate in ad campaigns for Clinton and other Democratic office-seekers.
Limbaugh said Clinton seemed "smug" in Monday's presidential debate.
The Democrats' fundraising exceeds the Republicans' by almost $20 million.
Alicia Machado says Trump made insulting remarks about her weight in 1996.
"Last night, he actually bragged about gaming the system to get out of paying his fair share of taxes."
Cuban frequently questions Trump's wealth.