For a place with a lousy reputation, lots of people want to become members of the U.S. Senate. And four of them want to oust a long-entrenched Oregon incumbent to get there. Democratic Sen. Ron Wyden is running for another six years in the November election. He faces challenges from Republican Mark Callahan, Libertarian Jim Lindsay, Shanti Lewallen of the Working Families Party, and former Ashland city councilor Eric Navickas, running as the Pacific Green Party candidate. They've all got ideas