The result might be a little skewed: Social conservatives boycotted the event, which has a history of taking more liberal stances, according to the newspaper. But it still demonstrates the growing GOP division over the issue.
"I believe this is a wedge issue that forces young people into the Democratic Party's hands," Jacob Vandever, a Republican legislative candidate who voted for the measure, told The Oregonian.
Same-sex marriages are currently prohibited under the Oregon constitution. The proposed ballot measure would amend the constitution to recognize them.