How Many Subpoenas?

OK, so now Harriet Miers and Rove aide Sara Taylor have been ordered to testify in the US Attorney scandal. Documents released last night implicated both of them, particularly in the replacement of Bud Cummins as US Attorney for Arkansas with Team Thompson member Tim Griffin.

Well, that's great. I don't think that the House or Senate Judiciary Committees have the stones to take this all the way, however. How will they enforce the subpoenas? Will they use the US Attorney for DC (that'd be the required legal recourse) to arrest Miers and Taylor? Will they sue the President to compel the documents they demand? This investigation has been dragging on precisely because the White House feels that Congress will back down when it counts. They always have. So will Pat Leahy and John Conyers go further to get what they want? Until then, these subpoenas are really a bit meaningless.