Biden urges Republicans to approve Ukraine aid, saying support cannot waver

US president says he is 'sick and tired' of domestic political brinkmanship as Volodymyr Zelenskiy vows to fight on in speech released on Defenders Day See all our Ukraine coverage Joe Biden has pressed congressional Republicans to back a deal to provide more aid to Ukraine, after provisions for Kyiv were left out of a bill to avoid a US government shutdown. The US president said on Sunday he was "sick and tired" of the political brinkmanship, and that US support for Ukraine could not be interru...