Yes, he is and he's to blame for it all. Latest polls say:
General Election: Trump vs. Clinton vs. Johnson vs. Stein Rasmussen Reports Clinton 45, Trump 38, Johnson 7, Stein 2
Clinton +7
General Election: Trump vs. Clinton LA Times/USC Tracking Clinton 43, Trump 46 Trump +3
General Election: Trump vs. Clinton vs. Johnson vs. Stein NBC News/SM Clinton 46, Trump 41, Johnson 8, Stein 3
Clinton +5
General Election: Trump vs. Clinton NBC News/SM Clinton 51, Trump 44
Clinton +7
Sunday, October 9
The problem from Trump is magnified because he needs to win large battleground states, and is mostly behind in them. When was the last time in a big election where the polls were off by 5 points?
History shows Trump has a giant ego ( his enemy and a strength ) and has always known when to cut his losses. If he drops any further in the polls, there is a chance, with some political deal making might step out of the race. Pence would beat Hillary Clinton. So would Kasich.