Chris Vance

Two weeks ago, it had swung toward Patty Murray. New polling shows the pendulum right in the middle.

And the race between Sen. Patty Murray and challenger Dino Rossi is back to a "toss up," according to one pollster.

The key is how pollsters are screening for likely voters, a tricky science at best.

The 9th Congressional District representative is barely leading his Republican challenger, according to a poll KING 5 released.

Not only is she leading, but she has also passed 50 percent, the key threshold of support for an incumbent.

This is from CNN/Time, and it can't easily be dismissed by Republicans.

There's reason to be cautious about a poll showing the incumbent 9 points ahead.