You keep saying "sign a bill". That's not what the electorate hears. They hear rhetoric that scares them to believe if Republicans can find someway to get such a bill to such a President, he will sign it. You can talk about the reality of that scenario all you want, but the masses don't sit down an discuss why it won't happen, they get upset when someone initmates they would like to see it happen, would welcome it, would sign it if it comes to them. I don't know why that's so hard to understand.
You'll see it's all a show, keep 'em laughing as you go, just remember, the last laugh is on you, and always look on the bright side of life!