Whoops: Joe Biden is in the news again. You know that’s a bad thing for Barack Obama. Apparently, Biden forgot that the official campaign definition of “rich” is $250,000. Those below that shouldn’t fear a tax hike, we’ve been told. But in a speech on Monday, Biden put the figure at $150,000. McCain struck back today in an appearance in Pennsylvania:

Senator Obama has made a lot of promises. First he said people making less than 250,000 dollars would benefit from his plan, then this weekend he announced in an ad that if you’re a family making less than 200,000 dollars you’ll benefit — but yesterday, right here in Pennsylvania, Senator Biden said tax relief should only go to “middle class people — people making under 150,000 dollars a year.” You getting an idea of what’s on their mind. A little sneak peek. It’s interesting how their definition of rich has a way of creeping down. At this rate, it won’t be long before Senator Obama is right back to his vote that Americans making just 42,000 dollars a year should get a tax increase.

The Biden statement fits nicely, of course, into McCain’s theme: $250,000 is a faint line in the sand, and Obama will erase it as soon as he’s forced to acknowledge the need for more revenue to pay for his proposed spending spree. So, Biden has now given McCain a helping hand on national security, clean coal, and taxes. McCain can only hope there are upcoming speeches from Biden on the Supreme Court, undivided government, and Obama’s past associations.