Lt. Gov. Brian Calley speaks at the annual Michigan Press Association convention

Lt. Gov. Brian Calley tweeted support for Donald Trump on Monday night, May 16, 2016. Here he is pictured on Feb. 6, 2015. (Cory Morse | MLive.com)

(Cory Morse)

LANSING, MI -- Lt. Gov. Brian Calley on Monday night tweeted his support for Donald Trump as the presumptive Republican nominee for president.

"It is time for republicans to unify behind @realDonaldTrump," Calley tweeted Monday night.

It's a shift for the state's lieutenant governor, who supported Ohio Gov. John Kasich in the Republican presidential primary this year. Calley is also assigned as a Kasich delegate to the national convention.

It is time for republicans to unify behind @realDonaldTrump. — Brian Calley (@briancalley) May 17, 2016

But as the candidate field has narrowed and Trump has emerged as the presumptive nominee, many of Michigan's top Republicans have shifted their support. A spokesperson for Gov. Rick Snyder said today the governor's priorities were on Flint and Detroit Public Schools - he has not endorsed a candidate.

Calley's announcement on Monday stirred reaction from the Democratic Twitter crowd, including Michigan Democratic Party Chair Brandon Dillon.

Cant wait for @briancalley to explain why he's endorsing a guy that wants to abolish the EPA, ban Muslims and mocks the disabled. #values — Brandon Dillon (@BrandonDillon75) May 17, 2016

One user blocked Calley over the matter.

Some weighed in in support of Calley's position.

YES!! Thank you Lt Gov Calley! MI for Trump! — Melissa Moran (@MissMeliss078) May 17, 2016

But others were outraged or disappointed by his choice:

This is the stupidest person to ever run for president and you should be ashamed of yourself. https://t.co/stQUxnK2ti — Seventh Kevin (@KevinBuist) May 17, 2016

Emily Lawler is a Capitol reporter on MLive's statewide Impact Team. You can reach her at elawler@mlive.com, subscribe to her on Facebook or follow her on Twitter: @emilyjanelawler.