Kitzhaber, a Democrat, had for weeks resisted calls for his resignation, but yesterday, he lost the support of two of the state's most prominent Democrats — Senate President Peter Courtney and House Speaker Tina Kotek.
Since then, report after report has emerged about how the first lady may have used her access to the governor's mansion to make money. Oregon Attorney General Ellen Rosenblum has started investigating Kitzhaber and Hayes.
Update at 5:18 p.m. ET. Sad Day For Oregon:
Kate Brown, who will become Oregon's new governor, said in a statement:
"This is a sad day for Oregon. But I am confident that legislators are ready to come together to move Oregon forward. I know you all have a lot of questions, and I will answer them as soon as possible. As you can imagine, there is a lot of work to be done between now and Wednesday."