Salient points, if you please:
(1) HRC's current problem is not that she used a personal server for official business. It goes deeper than that. Others before and after her have occasionally exchanged "government" communications on their personal email accounts, which they were using as a matter of convenience. HRC was DETERMINED to use a personal email account instead of the State Department server, which she knew would keep all of her communications permanently. So it was her PLAN AND INTENTION from the beginning to withhold and conceal a large portion of her official communications, and despite being told that this was illegal, she held to that plan. No other SoS had any such devious program in mind, it was merely convenience that occasionally got tripped up.
(2) Betting odds are not the same as a likelihood of victory, and in many cases are unrelated to the percentage chance of victory. Betting odds are based on one thing: How the payoff must be distorted in order to get an equal amount of money bet on both possible outcomes. Five months is an eternity in politics, and today's polls are near meaningless, as are today's "betting odds."
(3) Hillary's prospects at this time have very little to do with her qualifications, popularity, capabilities, or any of that. There are huge blocks of voters who vote almost unanimously for the Democrat candidate, no matter who it is. Blacks, government workers, Hispanics, gays & lesbians (not huge by any means), people in the arts, social sciences, and education, union members, welfare recipients, and so on. Hillary's job is to get all of these constituencies to show up on November 1. If they do, then the Republican candidate will have to get 95% of everyone else in order to win, which won't happen. It is her race to lose, which she may very well do. "Vote for me, I'm somewhat less disgusting than my opponent," doesn't seem like a winner to me.
(4) Hillary is physically not well. She is an OLD 68, and no one familiar with her medical condition would be the least bit surprised if she is unable to complete 4 years in office. Hence, her VP selection is almost as important as her own candidacy.
(5) Trump could win if he makes a wise VP choice, and if he works with the Republicans to develop a platform that the public will embrace (Like Gingrich's Contract With America). Which is why many people expect Gingrich to be a major player over the next couple months.