Bush for all his faults gave people something to vote for in 2004, 2008 total disaster with Maverick, total wipeout, then 2012 still trying to beat Obama with nothing except he is not an exact clone of Obama.
Trump is another whole ball of wax, now he is slightly unfashionable but give it a few months and the tide will turn as Hillary has awful optics.
Much of her current lead is from her advertising IMO. That’s very soft support that can easily change.
Trump will lag by a few points until he starts advertising her negatives and his positives. But that will be soft support for him too.
I expect he’ll have a ‘dash to the finish line’ ad campaign. That would be most effective and hardest for the media to counter.