Speaking from the Ukrainian capital three years after Russia’s invasion, the former PM said he believed a minerals agreement between the US and Ukraine was close to being signed - before then abruptly ending the interview.
Mr Johnson’s comments came after Mike Waltz claimed Ukraine will sign an agreement to cede control of much of its rare earth minerals to the US.
Pressed on how he thought world leaders should communicate with Mr Trump, Mr Johnson said: "You have to keep knocking the ball back over the net.
Boris Johnson was speaking from the Ukrainian capital on the third anniversary of the Russian invasion.
Boris Johnson abruptly ended a live interview in Kyiv on Good Morning Britain on Monday.
