Kevin Spacey believes that his "House of Cards" character President Frank Underwood will not join a debate with Donald Trump in the real-life U.S. presidential elections.

In an interview with CNBC Europe during the World Economic Forum in Davos, Switzerland on Thursday, the actor offered a scenario that will happen in case a debate will be set for President Underwood and the billionaire-turned-presidential hopeful.

"There would be a terrible accident on the way to the debate, and – it would be terrible, and very sad," Spacey said.

But Trump is the least of President Underwood's worries when "House of Cards" season 4 returns on Netflix. According to speculations, he could be facing his biggest political adversary yet – his wife Clara (Robin Wright).

The previous season ended with a shocker when Clara decided to leave the White House during his preparations for re-election. Series creator Beau Willimon previously revealed in an interview with The Hollywood Reporter that "Claire and Frank's separation will be a public one."

Willimon also said during the interview that Claire "will have to figure out what her next move is, and see if she can make it on her own. Will she seek office in her own right? Return to the non-profit world?"

According to Broadway World, the president continues to fight to secure his political legacy, while his estranged wife wants to be more than just the first lady of the United States. This prompted the recent speculations to claim that the ruthless president will do everything to stop Claire from her ambitions, even if it means that he has to have her killed.

"House of Cards" season 4 will premiere on Netflix on March 4, 2016.