LOS ANGELES - Stephen Colbert is on a mission to Russia.
CBS said Thursday that the late-night TV host is on assignment there for a future broadcast.
On Twitter, Colbert promised to help U.S. President Donald Trump during his Russian trip.
Colbert tweeted that Trump shouldn't worry about lacking tapes of his private conversations with fired FBI director James Comey.
In his tweet, the host of CBS' "Late Show" said, "If the 'tapes' exist, I'll bring you back a copy!"
Colbert's tweet followed posts in which the president said Thursday he has no such tapes, despite his earlier suggestion that they might exist.
