trump has certainly had a large impact, but some of the polls can be potentially misleading. like the ones that on quick-look seem to say trump is on top at 35%....but on closer examination it's not 35% of americans, or even registered american voters. it's 35% of republicans in iowa, which amounts to a tiny sliver of the country in a rural conservative state.
it's been said elsewhere but much of the rise of trump and fellow "outsiders" is due to demographics: older white males feeling threatened by societal and economic change, with their diminished employment prospects brought on by globalization and a growing technology-based economy for which they are not trained. they feel betrayed, left behind, frustrated by their declining stature and blame "the other" (immigrants, minorities, non-christians, gays, the PC police, weak liberals/democrats, etc.). they also tend to love the tough guy act, hence the macho "take our country back/make america great again" posturing. they are the perfect audience for a demagogue.
in fairness, though, washington is definitely corrupt and broken by any measure, so the rage again establishment politicians is shared by many democrats and independents as well.