You mean the polls that have shown a 15% bias to Dems for the last two elections or the ones that showed Reagan losing to McGovern by 40 pts.
Cruz had his chance last night and got Trumped.
So if the polls are that unreliable, why do the Trump supporters jump up and down over every poll that shows him ahead? If the polls have that much of a bias toward Dems, that may explain why Trump is leading in the primary polls - he is the closest to a Dem in the GOP field...