WASHINGTON - Republicans muscled President Bush's $87 billion plan for Iraq and Afghanistan through a Senate committee Tuesday but signaled they may ultimately defy the White House and structure some of the aid as a loan. The Senate Appropriations Committee approved the bill 29-0, with Democrats reluctant to oppose a bill dominated by funds for U.S. troops. But the unanimous tally belied sharp partisan divisions over $20.3 billion included for Iraqi reconstruction. With even GOP senators flashing signs of unease over the Iraq rebuilding money, the panel's chairman said a bipartisan compromise was being explored to provide some of the...