I'm not surprised. National polls, as well as the popular vote, don't mean anything in the U.S. It's the state by state results that matter, and last I looked
fivethirtyeight has HRC with an 84% chance of winning in their polls only forecast. Nate Silver has the states ordered by margin of lead for each Candidate. If his analysis is correct, and holds, Colorado decides the election in Clinton's favor.
Oh, it'd matter for the House. Polling in Texas at Trump's first low from his first meltdown showed a single digit lead, which would be very big in the overall popular vote count. It is the one big state they have to counter Illinois, New York, and California in the popular vote tally. I think a 10 point victory means Clinton can be close to the House. A 15 point would seem to point to a House takeover. Also, there is a desire by some (like me) who want Trump to lose as badly as possible to kill this vile movement in the US. They got their idiot candidate, now the US must trash them for putting him on the ballot.
In the electoral college, Trump won't be Mondale'd, but it is possible, I think for him to receive a lower percentage of the popular vote than Mondale did, but things need to continue going south, as America shows, it has very little in the way of memory. I think a group of women that Trump assaulted on a stage would do it.