The White House has formally invited Russian President Vladimir Putin to Washington, U.S. national security adviser John Bolton said Friday, returning to an idea that was put on hold in July amid anger in the U.S. over the prospect of such a summit.

U.S. President Donald Trump held a summit with Putin in Helsinki and then issued Putin an invitation to visit Washington in the fall. But that was postponed after Trump was accused of cozying up to the Kremlin.

"We have invited President Putin to Washington," Bolton said at a news conference during a visit to ex-Soviet Georgia, days after meeting Putin and senior security officials in Moscow.