President Trump now wants to give more weapons to Ukraine and is threatening increased sanctions if Russian President Vladimir Putin doesn't agree to end the war in 50 days. The president explained why in a phone call with our partners at BBC News.

The US president spoke to reporters on the White House South Lawn on Tuesday afternoon, the day after he threatened to impose "secondary tariffs" on Moscow

President Vladimir Putin intends to keep fighting in Ukraine until the West engages on his terms for peace, unfazed by Donald Trump's threats of tougher sanctions, and his territorial demands may widen as Russian forces advance,