Donald Trump's comments calling into question the US commitment to defend its Nato allies from attack were "dangerous" and "un-American", US President Joe Biden has said.Mr Biden seized on the former president's comments on Saturday, which sowed fresh fears among US partners about its dependability on the global stage.

Donald Trump's comments calling into question the US commitment to defend its Nato allies from attack were "dangerous" and "un-American", US President Joe Biden has said.Mr Biden seized on the former president's comments on Saturday, which sowed fresh fears among US partners about its dependability on the global stage.