There's coyote/wolf mixes back east but the bloodline mix goes quite a ways back. There's no way IMO that a wolf is gonna be standing that close to a coyote without that yote getting her ass handed to her by said wolf.
I was going to mention this same thing. The bloodlines back east do have wolf in them.
From what I've read, I don't think we'd see any crossbreeding over here (west). In fact, the one benefit that Wyoming saw, at least shortly after the introduction, was an increase in pronghorn numbers. This was attributed to wolves killing coyotes, the pronghorn's #1 killer of young.
With all that being said, I am FAR FROM AN EXPERT and am just throwing out a little bit of what I've read. (I do read a lot....kind of hobby of mine. And yes, sounds dull doesn't it?!...LOL)
That 'yote on the left is one HUGE dog though. Never seen one that big that I can recall.