Former US Vice President Joe Biden. AP Photo/Petros Giannakouris Former Vice President Joe Biden had more criticism for Hillary Clinton during a private donor conference hosted by Mitt Romney on Friday. Biden was speaking at the E2 Summit in Deer Valley, Utah, where he riffed on politics, past and future.

Reflecting on the vicious 2016 election between Donald Trump and Hillary Clinton, Biden said he knew a month before Election Day that Clinton would lose key battleground states, based on his assessment from his own campaigning in those states, Politico's Alex Isenstadt reported.

Clinton gave up Wisconsin, Michigan, and Pennsylvania — longtime Democratic strongholds — to Trump in 2016.

Last month, Biden said of Clinton's November defeat: "I never thought she was a great candidate. I thought I was a great candidate." Biden did not seek the presidency in 2016, but speculation about his potential run lingered for months.

That speculation appears to be ramping up again, as Biden plans to create a political action committee, possibly indicating his intentions to enter the 2020 race.