Senator Collins says undecided on final tax bill vote

By Valerie Volcovici WASHINGTON (Reuters) - Republican U.S. Senator Susan Collins, whose support was crucial in passing the Senate tax reform bill earlier this month, said on Sunday she has not yet decided whether she will back the final measure negotiated by House and Senate leaders. The moderate Republican from Maine has laid out conditions for her support of a final "conference committee" version of the tax proposal. Republican Senate leaders worked hard to get Collins' support for the legislation, the largest change to U.S. tax laws since the 1980s that would slash the corporate tax rate.