WASHINGTON (AP) — Rarely has an RSVP been so complicated.

President Donald Trump is open to visiting Moscow — if he gets a formal invitation from Vladimir Putin, the White House said Friday. Russian President Putin said he's game for a trip to Washington — but his answer came only after Trump retracted his invitation for a fall sit-down.

The awkward back and forth is the latest round of summit drama flowing from the two leaders' controversial first meeting in Helsinki this month. It underscores Trump's eagerness to forge a warmer relationship with Putin, though the Russian does not appear to s...