DENVER — Colorado's Republican-led Senate voted late Monday against expelling a GOP senator accused of groping a former legislative aide, with opponents of expulsion arguing there isn't enough proof to merit the ultimate sanction. Senators voted 17-17 to defeat the measure to expel Sen. Randy Baumgardner, who represents a rural northwest Colorado district. During Monday's debate, Baumgardner apologized to anyone he offended but reiterated his denial of any wrongdoing. He was the second Colorado legislator to face expulsion this session over sexual misconduct claims.