The pot-tax-worried members included Representatives Sam Farr (D-CA), Linda Sanchez (D-CA), Jared Polis (D-CO), Raul Grijalva (D-AZ), Pete Stark (D-CA) and Barney Frank (D-MA).
Seven senators did not vote, including presidential candidates Joe Biden (D-DE), Sam Brownback (R-KS), Chris Dodd (D-CT), John McCain (R-AZ) and Barack Obama (D-IL).