One of the signs of a weak incumbent is when opponents start coming out of the woodwork long before the election cycle.
Senator Gordon Smith already has his first announced opponent: Ty Pettit is the president and CEO of Microhelix, Inc. -- and is active with the DPO and part of a group of business leaders who supported Kerry for President. He's online at pettit4senate2008.com.
At this point, it's early to start picking favorites for the Democratic nomination - for an election that is more than two years away. But it's a good sign.