A fter meeting with Russian President Vladimir Putin on Friday, U.S. President Donald Trump was joined at the White House on Monday by Ukrainian President Volodymyr Zelenskyy and an array of top European leaders.

European leaders will join Ukraine’s president Volodymyr Zelensky for his crucial meeting with Donald Trump, European Commission chief Ursula von der Leyen said on Sunday.

"When it comes to security, there's going to be a lot of help," Mr Trump said, adding that European countries would be involved.