Republicans Fight to Get Tax Cuts Through By MARY DALRYMPLE, AP Tax Writer 12 minutes ago Republicans labored to advance their tax cut plans Tuesday, failing to muster enough GOP support in the Senate to extend tax cuts for capital gains and dividends beyond their 2008 expiration. The Senate Finance Committee voted 14-6 to endorse a package that would cut taxes by $60 billion over five years but would omit a GOP priority of preserving reduced tax rates for investment income. Sen. Olympia Snowe (news, bio, voting record) of Maine, a moderate Republican holding a pivotal vote on the committee,...