State Rep. Maxine Dexter and Susheela Jayapal, a former county commissioner endorsed by Sen. Bernie Sanders (I-Vt.), lead the pack of candidates in Oregon’s 3rd district Democratic primary. Dexter has given Jayapal, the sister of Rep. Pramila Jayapal (D-Wa.), a run for her money — literally, as she has raked in more than half a million…