WASHINGTON, Oct 2 (Reuters) - Lawmakers who want Iraq to repay the United States for its reconstruction voiced growing confidence on Thursday that the U.S. Congress will make part of the $87 billion bill for Iraq in the form of loans, defying President George W. Bush. Republican leaders in the U.S. Senate and House of Representatives worked to stem a push among their own members to make Iraq use its future oil wealth to repay some or all of the $20.3 billion Bush has proposed to rebuild it. But a spokesman for House Speaker Dennis Hastert, an Illinois Republican, said...