MARQUETTE, Mich. — A Michigan Republican has resigned after causing outrage by suggesting that UC Berkeley protesters should be shot.

Dan Adamini, secretary of the Marquette County GOP, told the Mining Journal of Marquette he stepped down so he isn't "a distraction and a hindrance to the work of the party."

Last week, Adamini tweeted: "Violent protesters who shut down free speech? Time for another Kent State perhaps. One bullet stops a lot of thuggery."

In 1970, the Ohio National Guard fatally shot four Kent State students during Vietnam War protests.

Adamini said he was calling for an end to violence after last week's student demonstration that stopped a speech by right-wing commentator Milo Yiannopoulos. Protesters broke windows and tossed smoke bombs.