Facing a reelection race in Oregon this fall, Portland Rep. Earl Blumenauer aired a television ad on April 25 focusing on marijuana legalization. Blumenauer’s heavily Democratic district lends him an easy reelection, but that hasn’t diluted his fervor to advocate for his signature issue. In the ad, Blumenauer points out how "our marijuana laws don't work and cost the government billions." Later, he calls for the federal government to "let states set their own laws -- tax it, use the money to fund…