From objective observation, Trump has been making some right campaign moves since his lowpoint back in July, like the New Orleans thing being one of them. He's also focused more on issues and less on petty Twitter snark, like continuing to go after Cruz.
Although I despise it, he's also taken the LGBTQSNAFUBAR social issues war off the table, so that the liberals can't play Church and morally judge him with their cult religious values. With Hillary's corruption trash all over the place via the leaked emails, and Trump being bold on pro-America v. her weak globalist multicultural garbage, it helps him.
He's accomplished this with alot of stumbling and bumbling and warts, but with Hillary so much worse, he looks better. Don't know if he can win but I think he's in the race.