State of Play:

Senate Majority Leader Harry Reid is in serious trouble, trailing three little-known Republicans in a crowded primary. The GOP field includes former state party chairwoman Sue Lowden, Danny Tarkanian (son of the famous UNLV basketball coach) and conservative State Rep. Sharron Angle. Though he trails, Reid had raised $15 million by the end of 2009. He may be further helped if a strong third-party challenger splits the conservative vote.

Primary election: June 8