That article is in the category of keeping up spirits of the faithful, IMO. Quinnipiac ‘rigged’ the poll (it says)? Q is rated rated A- as a polling org by Nate Silver with avg 0.7% error in favor of GOP. And then the writer while factually pointing out that Q projects higher white turnout in 2016 than 2012 makes the wholly unsupported statement that 2016 turnout will be the same as 2012, the ‘real’ number. The fact is nobody knows for sure how much Trump’s different appeal will or won’t boost white turnout. And it’s entirely reasonable to question if Clinton can drive minority turnout as much as Obama when he is not actually on the ballot.
I wouldn’t bet the farm on any poll, but the recent topic IMO, what I’m commenting on, is some people’s unwillingness to either acknowledge the race is close enough for Clinton’s winning probability to be well under 100%, or inability to actually think in terms of probabilities.
And there is, a so far small, trend of bad state polls, not just Q’s today, following increased attention to Clinton’s perceived honestly problem via the email thing, though whether that’s actually the cause or actually a sustained trend is yet to be seen. Other examples are Monmouth (A+ rated by Silver. 0.6 avg error in favor of D’s) Trump +2 in IA*, and JMC’s Trump +5 in a four way race in FL. Speaking of which the linked article only mentions the Quinnipiac outcomes head to head, but Trump was ahead 5, 1 and 6 in four way races in FL, OH and PA per Q. It’s reasonable to assume that minor party support will decline as the election approaches, but might be optimistic for Clinton to just go on the basis of forced head to head choice. Her support seems to suffer more than Trumps at the margin allowing minor parties. A number of polls have shown that, but most conversation and headline RCP national avg exclude 4 way polls.
*though even if Trump were to win IA, and NH where he’s been consistently competitive, that doesn’t eliminate the need to win all three of FL, OH and PA plus hold all Romney states; states like VA would have to be added plus IA and NH to give up OH or PA, and to win without FL more still: IOW Trump has to win all or almost all the key states some recent polls show him leading, ie his winning prob is lower than hers, but it’s not plausible IMO to say it’s zero or essentially so.