President Biden follows call with Putin by telling Ukraine that U.S. will act "decisively" if Russia invades

Wilmington, Delaware — President Joe Biden reiterated his statements that the U.S. and allies will act "decisively" if Russia further invades Ukraine to President Volodymyr Zelensky in a call Sunday, as Russia masses troops along the border between the nations.

It's the second call on the subject within a week for Mr. Biden, who spoke with Russian President Vladimir Putin on Thursday.

Mr. Biden and President Volodymyr Zelensky's call came as the U.S. and Western allies prepared for a series of diplomatic meetings to try to de-escalate a crisis that Moscow said could rupture ties with Washington.