When Donald Trump landed in Ohio this week, he got a taste of the meager Republican super PAC efforts aimed at him: a 47-second Web video clipping together some of his most provocative comments and a small airplane trailing a banner proclaiming, âOhioans Canât Trust Trump.â As the combative mogul enters his fifth month at the top of the GOP presidential field, attempts to derail him remain anemic, underfunded and unfocused â and they will probably stay that way until the Iowa caucuses in less than 10 weeks.