No, it's illegal to buy, sell, or own horse meat in the US. You have to go to Canada or Mexico-that's where the horse meat that is slaughtered in the US goes.
I support horse slaughter in the US because of ill treatment going on. People have nowhere to sell their unwanted horses so they leave them to starve or literally rot to death in the pasture from old wounds.
If you've ever been to a horse auction you would understand. People bring in horses that can't even stand and they don't get in trouble for the abuse they caused those animals. It's so bad cameras aren't allowed in the building. Although....since cell phones now have cameras I do have some nasty pictures of horses that NEED to be put down, they are well past EVER being brought back. It's absolutely disgusting. Horses with half their face rotting away from a wound that happened months ago....broken legs the horses drag around, or just lay on the ground with half their body rotting away from laying on it. People have no heart, and they don't want to pay for the horse to be put down. So they take them to the sale barn to try and sell them for slaughter, but now that the slaughter houses are closed some of these poor horses go back "home".