Most probable voters in the United States now approve of President Donald Trump’s job performance, according to a new poll.

Fifty per cent approved while 49 per cent disapproved, the Rasmussen Reports daily presidential tracking poll showed.

It was the first time Mr Trump had hit 50 per cent in the poll, which surveys 500 probable voters, since June 2017.

Other polls from earlier in the week had lower support for Mr Trump with Reuters/Ipsos putting him at 40 per cent, and Quinnipiac at 37 per cent.

At the same stage of his presidency the Rasmussen poll gave Barack Obama a 45 per cent approval rating.