Hillary Clinton urged Mitt Romney to take the secretary of state job when the incoming Trump administration approached him about the role, Romney said on Friday, adding that he would have taken the position had it been offered.
"I spoke with virtually all the former secretaries of state", Romney said here at the Experts and Enthusiasts, or E2, Summit, which brings together high-profile Republicans who are close to Romney.
CBS News' Stefan Becket tweeted that Clinton wasn't the only person who encouraged Romney to take the job if it was offered to him.
The two men were on opposite sides of the 2012 election - Biden as the running mate of President Barack Obama and Romney as the Republican presidential candidate.
The former MA governor was a candidate for the job even though he was a vocal critic of Trump during the Republican primary.
"I want you to understand that I'm optimistic in spite of all this clutter and confusion - that we can pull it off", Graham said.More news: Honda to roll out all-new Accord with no V6 option
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"We saw things very differently on the foreign policy front", Romney said.
According to The Associated Press, Romney did not directly mention the testimony in Congress a day earlier when fired Federal Bureau of Investigation director James Comey attacked Trump's credibility.
Last year, heartburn in the Republican Party over Trump played out at the summit, with some like Romney warning the brash billionaire would be destructive for the party and country.
It's the first time Romney has publicly discussed the process in detail.
Graham, speaking Friday afternoon, was franker in his concerns but said he hoped Trump could tackle items on his agenda like infrastructure and tax cuts and "still be a consequential president".
President Donald Trump declined an invitation to the gathering.