US President Joe Biden slammed his predecessor Donald Trump’s comment on NATO as “appalling and dangerous”. Biden said Trump “intends to give Putin a greenlight for more war and violence, to continue his brutal assault against a free Ukraine”. The US President slammed what he called Trump’s support to Putin to “expand his aggression to the people of Poland and the Baltic States”. NATO chief Jens Stoltenberg said Trump’s remarks “undermines all of our security” and put US and European troops at greater risk. Watch the video to find out why is Europe worried about Trump’s stance on NATO?