evidence: Senator Graham - who recently referred to Russia's invasion of Ukraine as "barbaric" - said he was "encouraged" by the comments. [...] These members of a growing isolationist wing of the Republican party appear motivated by Donald Trump. The former president has repeatedly questioned aid to Ukraine and refused to commit to supporting Kyiv. [...] "Quite frankly, Donald Trump is opposed to anything that President Biden is in favour of and that would be beneficial to the Biden presidency," Glenn Altschuler, a professor of American Studies at Cornell University, said.