Asking the Republican presidential ticket to explain how it plans to give a the massive tax cut to the rich while still balancing the budget and avoiding tax increases on the middle class is “laughable,” Virginia Gov. Bob McDonnell (R) told MSNBC’s Andrea Mitchell on Monday. Yesterday, Fox News Sunday’s Chris Wallace asked Romney’s running mate, Paul Ryan, to explain the math of the tax plan,but Ryan refused because he said “it would take me too long.” The Romney campaign has faced calls from Democrats, the media, and even other Republicans to get more specific about its tax and budget plans, but has thus far refused.