Of course it's a gimmick. All election politicking is theatre.
That doesn't mean it isn't worth doing. He's (a) spending time in swing states, (b) talking about how he will improve the economy and (c) giving swing state voters a contrast to Obama's shrill failed ideas.
What's not to like?
Because he can’t do what he promises. He doesn’t have the intestinal fortitude. Like all other pols, he will promise the moon and some will believe it. Then when things don’t work out the way these gullible people thought, they will elect the next charlatan who promises what he can’t deliver.
It’s been a long time since any pol told the truth and stuck to it. Perhaps Americans really can’t handle the truth.