WASHINGTON (AP) — Senate Democrats on Thursday demanded that Republicans provide more money for Amtrak so the railroad can tackle a $21 billion maintenance and repair backlog, including replacing tunnels more than a century old. A Republican-controlled House panel approved a spending bill the day after the crash that provide Amtrak's with $1.1 billion, a cut of $251 million from this year. The budget that President Barack Obama submitted to Congress in February proposed allotting Amtrak $2.5 billion next year, with most of the increase dedicated to capital investment in tracks, tunnels and bridge.