President Biden recently held an undisclosed East Room session with historians that included discussion of how big is too big — and how fast is too fast — to jam through once-in-a-lifetime historic changes to America.

Why it matters ... The historians’ views were very much in sync with his own: It is time to go even bigger and faster than anyone expected. If that means chucking the filibuster and bipartisanship, so be it.

Four things are pushing Biden to jam through what could amount to a $5 trillion-plus overhaul of America, and vast changes to voting, immigration and inequality.

1. He has full party control of Congress, and a short window to go big.
2. He has party activists egging him on.
3. He has strong gathering economic winds at his back.
4. And he’s popular in polls.

Presidential historian Michael Beschloss told Axios FDR and LBJ may turn out to be the past century's closest analogues for the Biden era, "in terms of transforming the country in important ways in a short time."