President Obama urged Americans not to read “some blog” or rely on Republicans to describe Obamacare, because they are telling “tall tales” about the law’s provisions.

“Don’t just read a blog or some commentary from some pundit that has a political agenda, make sure you know what the actual facts are,” Obama said Friday, moments after saying that Republicans are “still telling tall tales about [Obamacare's] impact.”

For instance, Obama issued this fact check: “Whenever insurance premiums go up, you’re being told it's because of Obamacare, even though there’s no evidence that it's the case,” he said, blaming insurance companies and employers instead.

Those Republicans apparently fooled one of their top political opponents, Sen. Chuck Schumer, D-N.Y., who was asked if Obamacare is driving up insurance premiums just a couple weeks ago.

“It’s in part because of Obamacare but health care costs have been going up by double digits for years and years and years,” Schumer said.

He retracted that answer last week. “The rise in health care premiums is market-driven and predates Obamacare,” Schumer told Talking Points Memo. “The fact is, the law is already working to significantly slow that rise, and ensure a higher quality of care to boot.”