You may recall an incident about a month ago, where House Oversight Committee chairman Representative Darrell Issa cut the power to ranking Democrat Elijah Cummings' microphone. At the time, Cummings was about to launch into another of his patented "these proceedings are unconstitutional" rants, and Issa shut him down with extreme prejudice. Now, we may have a better understanding of just why Cummings is so set against getting to the bottom of the IRS scandal.
...It seems he may be directly involved in it.