A former adviser to GOP presidential front-runner Donald Trump is promising “days of rage” outside the GOP convention in Cleveland if the Republican Party tries to whisk the nomination away from Trump and give it to someone more palatable to the party.

According to Buzzfeed, Roger Stone — who either quit or was fired by the Trump campaign last August depending upon who is talking — is modeling his street actions after the violent protests outside the Democratic convention in Chicago in 1968.

Despite no longer having any official affiliation with the Trump campaign, Stone has remained one of the candidate’s biggest boosters.

Stone promised disruptions at the convention earlier in the week, telling GQ: “I think there would be extreme anger by the Trump supporters. I don’t know that it would boil over into violence. Trump is certainly not advocating violence.”

With the possibility of a contested convention and Trump being denied the nomination, Stone has been tweeting out: “Stop the Steal March On Cleveland! @realDonaldTrump Supporters- drive,hitch-hike, bus or fly to “the Forest City’ July 18-21”

In an email interview with Buzzfeed, Stone said, the protests will be “organized by Trump nation,” in conjunction with conspiracy theorist Alex Jones’ Infowars.

Stone wrote, they will “will stage protests at hotels of state delegates of states supporting the BIG STEAL.”

“The Bush, Cruz, Rubio, Romney, Ryan, McConnell faction has united and is moving into high gear to steal the nomination from Trump,” Stone wrote in a column this week.

Accordingly, the Cleveland police department has been stocking up on riot gear — using a $50 million federal security grant — in anticipation of protests in the hot July weather both for and against the controversial candidate.