Trump heads to Iowa, acknowledges DeSantis is "probably" his biggest rival

Former President Donald Trump, en route to his first campaign visit to Iowa on Monday, said Florida Gov. Ron DeSantis was "probably" his biggest challenger for the GOP presidential nomination, but added that "we're not going to have much of a challenge." 

The former president spoke to reporters on his way to the first state in the Republican primary lineup next year, where he will address supporters Monday night.

Asked if the Florida governor was his greatest rival, Trump responded "I would say probably so, but you never know what happens. It could change. I think we're not going to have much of a challenge."