Milwaukee County Sheriff David Clarke Jr. brought the crowd at the Republican National Convention to its feet Monday night, declaring "Blue Lives Matter" to wild applause. 

“We simply cannot be great if we do not feel safe in our homes, on our streets and in our communities,” Clarke said during his convention speech.

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Clarke’s speech received the biggest applause of the night up to that point.

“I see this every day at street level, where many Americans increasingly have an uneasiness about the ability of their families to live safely in these troubling times. This transcends race, religion, ethnicity, gender, age and lifestyle.”

Clarke wrote an op-ed in The Hill earlier Monday, arguing that Black Lives Matter is the enemy.

“We as a people need to declare that we stand with rule of law, and not with the false tales of the revolutionary Marxist forces, who most recently have rebranded themselves from Occupy Wall Street to Black Lives Matter,” wrote Clarke.