This is reported by TASS with reference to the message of the White House.
The US administration added that the US president intends to meet with the British prime minister during the G7 summit, which will be held in France from August 24-26.
Earlier, Trump said that Johnson will be a great British premier.
State Duma Deputy Anton Morozov, in an interview with FAN, commented on the election of Johnson to the post of leader of the Conservative Party of Great Britain and to the post of prime minister.