[Fresh Wind]

“The other guys running, the Republicans — they protect each other,” Trump said early in his speech. “Me, I don’t care.”

So the “other guys running” are “the Republicans.” Not Trump.

He said "the other guys running, the Republicans", to differentiate them from the other guys running, the Democrats. (And yes, I consider Hillary to be "a guy".)

In no way does that that statement mean that Trump is saying he isn't a Republican.

[C. Edmund Wright]

but attacking W. Bush and Scott Walker FROM THE LEFT proves he’s a Democrat, down deep, in his heart of hearts.....

Notice I said attacking them FROM THE LEFT.... not attacking them period....