President Donald Trump took his endorsements of U.S. Senate candidate John James and governor candidate Bill Schuette a step further ahead of the Michigan primary election, participating in a robo call sent to Republican primary voters Monday ahead of the Aug. 7 election.

In the call, Trump reiterates his support of the two candidates, calling them both "Trump guys" who would be strong on the border, tough on immigration and will cut your taxes.

Trump said James is "truly the real deal - he will be a star," adding that he has the chops to take on incumbent Democratic U.S. Sen. Debbie Stabenow.

In the U.S. Senate Republican primary, James is running against businessman and economist Sandy Pensler. Schuette is running against Lt. Gov. Brian Calley, state Sen. Patrick Colbeck and obstetrician Jim Hines in the Republican gubernatorial primary.

Both James and Schuette have touted their Trump endorsements in campaign literature, featuring Trump's likeness and his endorsement tweets in advertisements and on social media.

On Monday, Trump added an additional endorsement tweet supporting James' candidacy: