Conservative talk radio host Mark Levin joined the chorus of conservative activists urging Senate Republicans to block any nominee President Obama puts forward to replace Justice Antonin Scalia, telling Stephen Bannon of “Breitbart News Daily” over the weekend that people criticizing this strategy of obstructionism just don’t “care about the nation” the way conservatives do.

“It is a terrible day when a nation loses a man like this, and God save us from what Obama must do,” Levin said. “And we must insist that the Republican Senate must stand up and give him no quarter, they must stand up and block anyone or anything Obama tries to do.”

“I don’t think we should ram through an Obama appointee in a Republican Senate, for God’s sakes,” he said. “I mean, I’m sitting here thinking about it, you’re going to hear people say, ‘Well, this is unprecedented if we do this, and the Republicans…’ These aren’t people who really care about the nation the way I do or you do or our audiences do. No, they like the direction of the country, they just don’t think we’re going fast enough or hard enough radical left.”

Levin also issued a warning to Senate Republicans who might consider voting on an Obama nominee, calling them a “Fifth Column” and warning that the Supreme Court fight is “a litmus test for the survival of the Republican Party.”

“If a Republican majority in the United States Senate confirms a nominee by the most radical president certainly in modern history, if ever, who has stated his goal of fundamentally transforming America,” he said, “if a Republican majority confirms one of his nominees, at least in my mind, it’s over.”