US lawmakers are calling for President Donald Trump to produce any tapes of his conversations with sacked FBI Chief James Comey.
Mr Trump alluded to the existence of the tapes in a May tweet.
Republican Senator Susan Collins told CNN that if tapes do exist, they should be turned over to investigators.
OUT: "...the special counsel."
DUR: 00"09
Republican Senator Susan Collins was asked by CNN if a subpoena should be given to the White House on any tapes.
OUT: "...and for all."
DUR: 00"09