What a Rebuke Is

Over at the conservative PA Independent site, Eric Boehm characterizes this statement from Bob Casey as a “rebuke” of President Obama:

“Everyone knows that when someone builds a business, and it is successful, it is successful for a variety of reasons,” he said. “One of the reasons they are successful is that they work hard.”

The only way this counts as a “rebuke” of the President is if you think Obama was really saying that business owners didn’t build their businesses.

But since that’s clearly not what Obama was saying, it’s not a rebuke. There’s just nothing in Bob Casey’s statement for Obama to dispute. What’s the disagreement supposed to be?