The nonpartisan FactCheck.org has issued a report criticizing John McCain’s oft-repeated charge (blogged yesterday) that Barack Obama’s tax plan would raise the taxes of America’s 23 million small business owners:  McCain’s Small-Business Bunk:

McCain has repeatedly claimed that Obama would raise tax rates for 23 million small-business owners. It’s a false and preposterously inflated figure.

We find that the overwhelming majority of those small-business owners would see no increase, because they earn too little to be affected. Obama’s tax proposal would raise rates only on couples making more than $250,000 or singles earning more than $200,000.