Bruce Bartlett has served in various functions under a number of conservative leaders, including Congressman Ron Paul, President Ronald Reagan, and President George H. W. Bush. Barlett wrote “Reaganomics: Supply-Side Economics in Action” and co-edited “The Supply-Side Solution.” He served on the House banking committee and wrote for the National Center for Policy Analysis, the Cato Institute, and the Heritage Foundation. And he now admits he was wrong: while supply-side economics may have made sense in the ’70s and ’80s, it has no place in America’s modern economic policy.

Bartlett spoke with “Viewpoint” host Eliot Spitzer about how he came to realize that stimulus is the key to reviving a struggling economy — not lower tax rates.

Bartlett said he came to this conclusion while working on a book about the Great Depression: “I convinced myself John Maynard Keynes was right.” He argues that what the economy needed during the 2008 financial crisis was “an easy money policy. … I think our problem is we didn’t get enough.”

Most Republicans still believe lowering tax rates, not increasing spending, is the way to go because “they only listen to people on their own side,” Barlett says. “They never ever reach out to anybody who’s not part of the clan.”

Watch the full interview here, and tune in to ‘Viewpoint’ Monday-Thursday @ 8E/5P on Current TV.