Republican National Committee Chairman Reince PriebusReinhold (Reince) Richard PriebusEx-Sen. Cory Gardner joins lobbying firm Democrats claim vindication, GOP cries witch hunt as McGahn finally testifies Biden's is not a leaky ship of state — not yet MORE said Wednesday that Vice President BidenJoe BidenGOP report on COVID-19 origins homes in on lab leak theory READ: The .2 trillion Infrastructure Investment and Jobs Act Senators introduce bipartisan infrastructure bill in rare Sunday session MORE would be a tougher Democratic opponent in the race for the White House than Hillary ClintonHillary Diane Rodham ClintonClintons, Stacey Abrams meeting Texas Democrats Biden says Russia spreading misinformation ahead of 2022 elections Highest-ranking GOP assemblyman in WI against another audit of 2020 vote MORE.

“I think he's probably tougher. I think Hillary Clinton has a lot of problems,” Priebus said during an appearance on NBC's "Today" show. “I think she is an opponent that's easy to define.”

ADVERTISEMENT

Priebus said the former secretary of State has “a lot of problems generally, and if you look at the polling numbers, even women are not even gravitating toward Hillary Clinton.”

Speculation that Biden may launch a surprise White House campaign and challenge Clinton, the clear Democratic front-runner, spiked over the weekend with reports that Biden was taking meetings about a potential run.

Biden hasn’t offered any direct hints he will launch a 2016 bid, and joked about the possibility when asked by a reporter Tuesday. But a series of articles quoting people close to Biden have said the vice president is considering his options.

President Obama also hasn't said whether he would support Biden, whose son Beau died of brain cancer in May.

“I think Joe Biden is someone that a lot of people, whether they like his politics or not, they like him and likability ... is probably the No. 1 issue on the ballot,” Priebus said on NBC.