Earlier this week, the Washington Post predictably gave some publicity to the Keynesian analysis of Mark Zandi, even though his track record is worse than a sports analyst who every year predicts a Super Bowl for the Detroit Lions. The story also cited similar predictions by the politically connected folks at Goldman Sachs.

Zandi, an architect of the 2009 stimulus package who has advised both political parties, predicts that the GOP package would reduce economic growth by 0.5 percentage points this year, and by 0.2 percentage points in 2012, resulting in 700,000 fewer jobs by the end of next year. His report comes on the heels of a similar analysis last week by the investment bank Goldman Sachs, which predicted that the Republican spending cuts would cause even greater damage to the economy, slowing growth by as much as 2 percentage points in the second and third quarters of this year.

Republicans understandably wanted to discredit this analysis. But rather than expose Zandi’s laughably inaccurate track record, they asked the Chairman of the Federal Reserve, Ben Bernanke, for his assessment. But this is like asking Alex Rodriguez to comment on Derek Jeter’s prediction that the Yankees will win the World Series.

Not surprisingly, as reported by McClatchy, Bernanke endorsed the notion that spending cuts (actually, just tiny reductions in planned increases) would be “contractionary.”

Bernanke was asked repeatedly about GOP proposals to trim anywhere from $60 billion to $100 billion in government spending during the current fiscal year, which ends Sept. 30. These cuts would do little to bring down long-term budget deficits but would slow the economic recovery, he cautioned. “That would be ‘contractionary’ to some extent,” Bernanke said, projecting that “several tenths” of a percentage point would be shaved off of growth, and it would mean fewer jobs. …While Democrats got what they wanted out of Bernanke with that answer, he frowned on some of their projections that the spending cuts that are being debated could reduce growth by a full 2 percentage points.

Since he is not a fool, Bernanke was careful not to embrace the absurd predictions made by Zandi and Goldman Sachs. But that’s merely a difference of degree. Bernanke’s embrace of Keynesian economics is disgraceful because he should know better. And his endorsement of deficit reduction (at least in the long run) is stained by crocodile tears since Bernanke supported bailouts and endorsed Obama’s failed stimulus.

But while Bernanke is not a fool, I can’t say the same thing about Republicans. Bernanke has made clear that he either believes in the perpetual-motion machine of Keynesianism, or he’s willing to endorse Keynesian policies to curry favor with the White House. Republicans should be exposing these flaws, not treating Bernanke likes he’s some sort of Oracle.