Candidate Donald Trump has opened new offices in the state of Oregon:

[…]  A group of Donald Trump supporters were watching that primary unfold from west Eugene. The event marks the grand opening of the Donald Trump Campaign Headquarters, on the corner of 7th Place and Wilson Street. This is one of several offices throughout the state. There’s also offices in Portland and Salem.

They’re hoping to open others in Bend and Medford next. Volunteers will be making calls and going door-to-door to spread awareness about the Trump campaign. They said they’ve already started making calls, but the call center will officially be up and running Wednesday.  (read more)

Oregon voters vote by mail in ballot and the last day to change party affiliation or register to vote in the primary is April 26th.
The primary date is Tuesday May 17th and there are 28 delegates at stake.  The delegates are awarded by proportion according to the vote.  Oregon votes by mail. Ballots must be in the hands of election workers or in an official drop-off location no later than 8 PM local time on May 17th.  Oregon is a “Closed Primary” – You must be registered as a Republican.

You can register on-line HERE and much more information is available at the Oregon Secretary of State Website HERE.