The motion argues that the subpoenas are barred by the Constitution's speech or debate clause, which protects elected officials from being questioned in a lawsuit about their legislative work.
AP Sports Writer Joseph White contributed to this report.
Follow Fred Frommer at http://twitter.com/ffrommer
Follow Joseph White at http://twitter.com/JGWhiteAP
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.