Conservative author and talk-radio host Mark Levin.

(CNSNews.com) -- At a meeting of Tea Party conservatives in Washington, D.C. on Thursday, conservative talk radio host Mark Levin said President Barack Obama “doesn’t have the constitutional authority to do half of what he’s doing,” and added that the “Republican leadership” has not taken any steps to stop Obama's unconstitutional actions.

CNSNews.com asked Levin, “Do you believe Obama has the constitutional authority to address climate change or minimum wage without congressional approval?”

Levin said, “Of course not. He doesn’t have the constitutional authority to do half of what he’s doing.”

“But nobody appears to want to stop him,” said Levin. “Has the Republican leadership taken any steps whatsoever? No."

"It’s about time when the Supreme Court gets a chance it steps up too," he said. "But, so far it’s given him power he doesn’t have under the Constitution on the health care law; it’s given him power he doesn’t have under the immigration law; it’s given him power he doesn’t have under DOMA [Defense of Marriage Act]. So the Supreme Court looks like it’s willing to go along with this.”