Nightshade?

I'm also thinking nightshade. Which is more easily identified by its leaf shape - 3 distinct nodes. FWIW nightshade is poisonous

It's Climbing Nightshade,aka Bittersweet Nightshade, Solanum dulcamara. I found it in my Audubon Wildflower Guide. A poisonous vine that I just pulled out last week. The flowers are pretty, but anything that wants to choke something else, I pull. It came from Europe and according to the Audubon Guide, the English used it a few centuries ago to counteract witchcraft. Wish I'd known that before tossing it...I have one neighbor who, oh, well.

Jane :) more on website below

Here is a link that might be useful: Noxious Weeds, Washington State

Wow that is definitely the plant. Never saw it here before but not keeping it now and looking out for others. Shame because the flowers are very pretty.

Thanks everyone for the responses and the website link