I'm very pleased to note how this "political" topic has moved forth with maturity and respect.
Over this past decade where $5/ga has become reality, a 'remigration' to urban areas has occurred, and environmental concern has risen, Amtrak has gained so much traction as a provider of needed passenger transport that no politician would dare cast it asunder.
"Kill Amtrak", "kill PBS", put The New York Times out of business, "drill baby drill", "church and state are one", is simply party line that appeals to the largely rural Red State constituency the Republican party harbors as its base. Regarding Amtrak, so much of that constituency is served by the "one a day at oh dark thirty" that there is no way Amtrak has relevance for transportation, but that "one a day' is simply part of "the Washington way". Republican pols may talk the talk on Amtrak, but I doubt if they would walk the walk.
Should the "appears inevitable' occur and Gov. Romney is the Republican nominee and with the 'reasonable possibility' he could defeat President Obama ("probably' if something resembling a "double dip' occurs or 'we get hit'), the services that count, i.e. the Corridors, would be unscathed, although somewhere, to keep his Red State constituency happy, there would likely be a "pruning' of a vulnerable LD route, or consistent with what occurred during the Bush administration with the Three Rivers and the Silver Palm.