One thousand dollar fine and 12 months in prison is maximum for contempt of congress, a misdemeanor.
I found this to be interesting...Per wiki: Concerned with the time-consuming nature of a contempt proceeding and the inability to extend punishment further than the session of the Congress concerned (under Supreme Court rulings), Congress created a statutory process in 1857.
Therefore, it seems as if this tactic for the now would be moot, since this Congress comes to an end in January...not much time to create a coercive effect...and would probably end up creating a Media Martyr Star instead.