Maggie Hassan and Kelly Ayotte clashed again on stage.
"I forgot that your parents came all the way from Thailand to serve George Washington."
"I don't think Senator Warren speaks for New Hampshire," Sen. Kelly Ayotte said.
The GOP senator is sparking quick backlash from Democrats.
Kelli Ward, defeated by McCain, says she'll challenge Flake in 2018.
Sen. Ron Johnson is attacking Russ Feingold over his Progressives United PAC.
Maggie Hassan's campaign says Ayotte is "secretly sending mail pieces saying Trump needs Ayotte in the Senate."
Sen. Marco Rubio and Rep. Patrick Murphy faced off Wednesday.
But the Utah Republican said he can't defend or endorse the GOP nominee.
Mark Kirk says he is "frustrated" with both Hillary Clinton and Donald Trump.