Donald Trump has claimed he rejected Russia's deal to swap the " Merchant of death " arms dealer.
Viktor Bout, 55, was freed last week in exchange for the return of WNBA star Brittney Griner despite being convicted in 2011 of conspiracy to kill Americans by supplying a Colombian terrorist group with weapons.
Basketball star Griner, who arrived in Moscow in February this year with vape canisters containing cannabis oil in her suitcase, had seen sentenced to nine years in a Russian forced labour camp.
