The general argument I've heard that synthesizes both: They gave Trump too much credibility by treating him as an equal while attacking Clinton (were "pro-Trump"), but endorsed Clinton and crowed triumphantly at every step that she had it in the bag (were "pro-Clinton").

We should probably stop making absolute claims about anything regarding this election, as there are so many moving parts it is impossible to conclusively place responsibility at any one group's feet.

Then again, that may have been the point you were making :)

I believe 'they' in the sentence refers to the media. As in, info from Wikileaks suggests that "[the media] is in bed with the Clinton campaign".

'They' being the media in that sentence.

It's more complicated than either one.