As the corporate tax battle begins to heat up in D.C., a group led by conservative tax activist Grover Norquist is staking out ground against one of Donald Trump's campaign promises: To close the carried interest tax loophole.

But its argument doesn't hold water.

Facts matter: What is carried interest and how is it taxed?

What Norquist says: Americans for Tax Reform wrote on Tuesday that carried interest should continue to be treated as a capital gain. In addition to arguing that carried interest is "indistinguishable from any other type of capital," it adds:

Oh really? For starters, none of the tax increase would directly affect pension funds, charities or colleges (most of which are tax exempt anyway). So perhaps this would be an indirect cost, in that successful hedge fund and private equity fund managers will take their balls and go home. If so, ATR provides no evidence to support the claim.