Rep. Rick Renzi wants a delay in the start of his trial. Based on this article in CQPolitics, it sounds like his lawyers intend to use the Constitution's Speech and Debate Clause as a defense:

Embattled Rep. Rick Renzi , R-Ariz., has asked a federal judge in Arizona to delay his scheduled April 29 trial on conspiracy, fraud, extortion and money laundering charges stemming from a land-swap deal.

Prosecutors will not oppose the Arizona lawmaker’s bid to have his trial deemed a “complex case,” which would allow more time to sort out motions, discovery and other pre-trial issues.

Renzi’s lawyers also said that because he is a sitting congressman who faces allegations related to his legislative activities, they would raise the issue of legislative privilege afforded by the Constitution’s Speech or Debate clause.

Renzi pleaded not guilty March 4 to a 35-count indictment — handed down Feb. 21 — that charges he conspired with one former business partner in a land-swap scheme and with another associate to commit insurance fraud.

Renzi, 49, maintains he is innocent of any wrongdoing.