All of the charts in this post represent the results of the newest Economist / YouGov Poll. It was done between August 19th and 23rd of a random national sample of 1,300 voters, and has a margin of error of 4 points.
I think the three charts above show what a strange and unusual election we're having this year. To start with, both of the major presidential candidates have a majority unfavorable rating -- with Clinton viewed unfavorably by 53% and Trump viewed unfavorably by 62%.
It gets even crazier when you look at the middle chart above. It seems that a sizable portion of the population actually believes either Clinton or Trump is "evil" -- with 38% saying that about Clinton and 39% saying that about Trump. Frankly, I don't remember an election in which so many people were willing to put the "evil" label on a candidate.
The third chart above shows the percentage that say they could NEVER vote for Trump or Clinton. About 50% say they could never vote for Trump and 47% say the same about Clinton. If this is true, then it doesn't look like there will be the winning candidate with a runaway popular vote (although there could be a substantial margin in the electoral college).
We still have about 10 weeks until the 2016 presidential election, but looking at the charts above, I'm not sure the margins will change very much before we vote. People seem to have a pretty substantial dislike of one candidate or the other, and have already decided who they will vote for. This is not good for Trump, who is trailing in all the polls.
The chart below shows the current support for Clinton and Trump from this YouGov Poll.