Trump has ripped Biden for considering a 2020 run. In a recent Fox News interview, the president said he’s not concerned about the Democratic field.

“I’m not worried. So far I love the competition, I love what I see,” Trump said in January. When asked at the time whom he would like to run against, Trump didn’t commit to a particular candidate but went on to call Biden “weak” and claimed President Barack Obama “took him off the trash heap” when he chose him to be his vice president in 2008.

A White House spokeswoman referred CNBC to the Trump campaign. Kayleigh McEnany, the Trump campaign’s press secretary, did not return repeated requests for comment. Biden’s spokesman declined to comment.

The first contests of the primary are under a year away, while the first Democratic debates are slated for later this year. Early polls show Biden is the favorite among Democratic primary voters and may have an advantage over the president in a one-on-one election.

In a 2018 POLITICO/Morning Consult poll, Biden led in a head-to-head matchup with Trump. Forty-four percent of voters said they would pick the former Delaware lawmaker, while Trump received support from 37 percent. The survey was of 1,993 registered voters from July 26 to July 30.

Biden is leading in most of the national polls of the potential Democratic field, including a Morning Consult survey that shows him with 31 percent of early primary voters saying they would back him if he runs. Behind him are Sens. Bernie Sanders of Vermont, Kamala Harris of California and Elizabeth Warren of Massachusetts. The poll has a margin of error of plus or minus 1 percent.