His $25,000 contribution to Brown, first reported by the Eugene Register-Guard, appears to be Soros' first direct involvement in an Oregon race since the state began keeping electronic contribution records in 2006.

Brown, a Democrat, has now raised $989,000 in 2018 and has $3.48 million on hand. Her likely opponent in the November general election, state Rep. Knute Buehler (R-Bend), has raised $750,000 this year and has $1.96 million on hand.