I was just reading through the website for the secretary of state for Oregon, and I came across this: Types of Public Office There are two types of public offices in Oregon, partisan, and nonpartisan. Any person can run for a partisan or nonpartisan office if they meet the requirements of the office and are registered to vote. Partisan Offices Candidates for partisan office may run as the nominee of a major or minor political party or as nonaffiliated. Major party candidates must win the primary election, in order to then run in the general election. Minor party and nonaffiliated candidates qualify for the ballot without running in the primary election; they first run for office at the general election. Partisan offices include: US President, US Senator, US Representative, Governor, Secretary of State, State Treasurer, Attorney General, State Senator, and State Representative.

Is this true? I can only run for Senator, Congressman, etc. by affiliating with a major political party? That seems wrong to me.