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Patrick Semansky, Associated Press
In this aerial photo, emergency personnel work at the scene of a deadly train wreck, Wednesday, May 13, 2015, in Philadelphia. Federal investigators arrived Wednesday to determine why an Amtrak train jumped the tracks in a wreck that killed at least six people, and injured dozens.

WASHINGTON — Republicans on a powerful House panel have blocked a bid by Democrats to boost Amtrak's budget by more than $1 billion. That included $556 million targeted for the railroad's Northeast corridor, where a fatal derailment occurred Tuesday night.

The move by Philadelphia Democrat Chaka Fattah failed on a party-line vote as the Appropriations Committee debated a $55 billion measure funding transportation and housing programs. The GOP measure would slash Amtrak's budget to $1.1 billion, an 18 percent cut that's likely to be reversed after negotiations later this year.

President Barack Obama, however, asked for almost $2.5 billion for Amtrak in his February budget, much more than he'd requested in previous years. But the White House didn't specifically protest the Amtrak cuts in a letter sent to lawmakers on Monday.