Indiana Gov. Mike PenceMichael (Mike) Richard PencePolitical figures pay tribute to Charles Krauthammer The media just can't stop lying about Trump Hollywood goes low when it takes on Trump MORE (R) said Gennifer Flowers, a woman with whom former President Bill ClintonWilliam (Bill) Jefferson ClintonThe case for a ‘Presidents’ Club’ to advise Trump After FBI cleared by IG report, GOP must reform itself Bill Clinton hits Trump administration policy separating immigrant families in Father's Day tweet MORE had an extramarital affair, won't be attending the presidential debate on Monday night.

She "will not be attending the debate tomorrow night," the GOP vice presidential nominee said on "Fox News Sunday."

Pence, Republican presidential nominee Donald TrumpDonald John TrumpCNN analyst Kirsten Powers: Melania's jacket should read 'Let them eat cake' CNN's Cuomo confronts Lewandowski over 'womp womp' remark Sessions says FBI agent Peter Strzok no longer has his security clearance MORE's running mate, attempted to draw a clear contrast between the policies of Trump and those of Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonSessions says FBI agent Peter Strzok no longer has his security clearance Melania Trump puzzles with 'I really don't care' jacket Grassley wants to subpoena Comey, Lynch after critical IG report MORE.
"Hillary Clinton apparently thinks this is an episode of 'Shark Tank,' but this is America," Pence said.
"It's serious business."

Pence said Trump's tweet about bringing Flowers to the debate was "really mocking the fact that Hillary Clinton was trying to distract attention away from this moment in our national life where the American people are going to see a strong contrast between" both candidates.

Trump tweeted on Saturday that if "dopey Mark Cuban of failed Benefactor fame wants to sit in the front row, perhaps I will put Gennifer Flowers right alongside of him!"

Bill Clinton testified under oath in 1998 saying that he had a sexual affair with Flowers.

Trump was responding to billionaire Cuban, who last week said he accepted an invitation from Clinton to sit in the front row at Monday's debate.

Flowers appeared to accept Trump's invitation on Saturday.

"Hi Donald. You know I'm in your corner and will definitely be at the debate!..." she tweeted.

— This report was updated at 9:26 a.m.