1 - One reason to trust the polls. Everyone said the same thing about oversampling, being fixed, landlines, rally attendance, etc in 2008 & 2012
And in 2012 the RCP average of polls had them off by 2.6%. That is actually huge considering that is a poll of polls and the margin of error for each is reduced as they are totaled. So yeah, 2012 is a good reason to not trust polls. And it has gotten worse since.