Since asserting things without any evidence seems to be the way politics is done these days, then yeah, of course it was a publicity stunt.

Republicans are going to say the Democrats did it, and Democrats are going to say the Republicans did it. That's the way our country works now.

Hardly anybody will go by the evidence, which very obviously points to this being a lone gunman who bought an AR15, climbed up a roof, and took a bunch of shots at Trump before the Secret Service shot him...