If a bill has the support of both Republicans and Democrats, be concerned. That's certainly the case with a bipartisan transportation bill moving through the Senate that would double the federal subsidies given to Amtrak.

Last week, the U.S. Senate's Committee on Commerce, Science, and Transportation voted 25 to 3 to advance a $78 billion surface transportation bill that gives the government-owned passenger rail service $19 billion over five years, for an average of $3.8 billion per year.