i don't really know who is behind it. it might be the vice president, or maybe the oil guy.
but i don't believe that huck was the first person that they would have hired. maybe they hired the other crazy killer guy, and huck knew about it and intercepted the hit somehow.
the order was probably to kill the president, but he wanted to make sure that he didn't.
it has to do with the girl too. someone must know that she's been calling around. the reporter already found out that the presidential election was rigged, and she wasn't far from finding it either.
idk. just don't kill/jail huck shonda.