More than four in 10 evangelical Christians would approve of Donald Trump being impeached and removed from office following a Senate trial, according to a new poll.

It came after Christianity Today, a prominent evangelical magazine, called last week for the president's removal and described his actions as "profoundly immoral."

Mr Trump has hit back at the apparently growing fissure within America's evangelical movement, lambasting the magazine as "far left".

He also announced plans to launch a new movement called "Evangelicals For Trump," gathering leading religious figures for an event in Miami on Jan 3.

People identifying as evangelical make up to one in four of all US voters.