Pot advocates: Looser guidelines leave questions SAN FRANCISCO - A new Obama administration policy loosening guidelines on federal prosecution of medical marijuana on Monday signaled to users that they had less to fear from federal agents but still left their suppliers to contend with a tangled mesh of state laws and regulations. Another GOP senator open to health care overhaul WASHINGTON - Another Republican senator says she's open to voting for a sweeping health care overhaul this year. Maine Sen. Susan Collins said Wednesday the status quo is unaccaptable and she shares the goal of passing responsible health care legislation to expand coverage and curb costs. 'Clunker' sales nearing quarter-million; what now? WASHINGTON - The White House warned Monday that the "cash for clunkers" program, already zooming toward a quarter-million trade-ins with the initial $1 billion in rebates, could sputter to a stop by Friday unless the Senate quickly approves $2 billion more.