

After a staff shake-up in August, Trump has largely abandoned the free-wheeling style of campaigning that energized his supporters but also led to an endless string of controversial comments about women, minorities and others. The Republican nominee's newfound ability to stay on script has coincided with tightening in both national polls and surveys in some key swing states.



"The last few days feed into a sense of uncertainty," said Chris Kofinis, a Democratic strategist. He said Clinton's rough weekend raises the stakes for the first presidential debate on Sept. 26, which "will either finish Trump or, if he does well, it will create a race."



Privately, some Republicans say Trump would likely be losing more convincingly to another Democratic nominee. But Clinton's unpopularity rivals that of her opponent, and she's been unable to do much to change the minds of Americans who believe she is dishonest and secretive.



To be sure, Clinton continues to have numerous advantages over Trump as the race presses into its final weeks.