reinstate the national ban on the practice of horse slaughter and close existing US horse slaughter facilities.

Horse slaughter is a completely unnecessary practice that was illegal throughout the US until recently. Special interest groups have succeeded in reintroducing the barbaric practice to US soil.
Horse slaughter should not be permitted in America for these reasons and more:
1. It is not possible to slaughter horses humanely.
2. Horse meat is dangerous for human consumption because of the unregulated administration of numerous toxic substances before slaughter.
3. It does not prevent horse overpopulation or abandonment.
For data backing these up, and for other reasons why horse slaughter is unnecessary and abominable, you can visit humansociety.org or any number of other available resources.
Despite the money invested in promoting slaughter, the facts are on the humane side. Save our horses!