Based on analysis of current trends, the WSJ has an article stating, in brief, that there are four battleground states that Trump must win - i.e., win all four - if he is to have even a chance of winning overall. That assumes the "safe" states for each party stay as they are.
That means that if Clinton wins just one of those states, Trump loses. If you do the combinatorics on four states with two options for each state, you end up with 16 unique combinations, only one of which has Trump winning all four states. That means that Trumps chances, based on current data and the assumption that all the other states will remain the same, are one in sixteen.
Yes, that looks worse than the opinion polls alone indicate, but there's a reason for that: the electoral college, the way that electoral college votes are assigned, and the state-by-state nature of the presidential election. Basically, a nation wide opinion poll is almost meaningless because it does not take these factors into account.
So, as I've said repeatedly before: dear Trumpkins, thank you for picking the one candidate who will guarantee that Clinton is the next president.