Former Speaker John BoehnerJohn Andrew BoehnerBottom line Pelosi and Trump go a full year without speaking Jordan vows to back McCarthy as leader even if House loses more GOP seats MORE (R-Ohio) on Thursday took shots at Sen. Ted CruzRafael (Ted) Edward CruzHillicon Valley: Big Tech hearing the most partisan yet | Rubio warns about foreign election interference | Trump campaign site briefly hacked Tech CEOs clash with lawmakers in contentious hearing Trump announces intention to nominate two individuals to serve as FEC members MORE (R-Texas) and said he wouldn't be surprised if Hillary ClintonHillary Diane Rodham ClintonHillary Clinton responds to Chrissy Teigen tweet: 'I love you back' Trump fights for battleground Arizona Biden leads Trump by 12 in new national poll MORE ends up withdrawing from the presidential race.

Addressing the SALT Conference in Las Vegas, the former Speaker suggested that Democrats might have to turn to Vice President Biden to be their 2016 nominee.

Republicans have long speculated that the FBI investigation into Clinton's use of a private email server could result in criminal charges, wounding her candidacy.

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Boehner, who resigned from Congress last fall amid an uprising from conservatives, also hammered Cruz, who was often his adversary in high-profile legislative fights.

"Thank God that guy from Texas didn't win" the nomination, Boehner said.

Boehner had called Cruz "Lucifer in the flesh" and a "miserable son of a bitch" before last week's Indiana primary sealed the Republican nomination for Donald TrumpDonald John TrumpHillary Clinton responds to Chrissy Teigen tweet: 'I love you back' Police called after Florida moms refuse to wear face masks at school board meeting about mask policy Supreme Court rejects Trump effort to shorten North Carolina mail-ballot deadline MORE.

"I got criticized by some satanic organization for giving Lucifer a bad name," Boehner quipped.

Boehner said anyone who thinks Trump can't win the White House should "just watch."

"This is going to be a presidential campaign like we've never seen before," he said.

And he said even if Republicans aren't unified around Trump, he said everyone shares the goal of winning the White House. He predicted the GOP will hold the House this fall despite predictions from Democrats that the chamber could be in play.

Tags Hillary Clinton Donald Trump John Boehner Ted Cruz Boehner