Given Hillary's problems with the truth, flaws in her story look like possible lies. Hillary never tells a truth that will hurt her. She lies, she prevaricates, she misdirects, she stonewalls, but she never comes out and tells the truth. It's a major character flaw and it hurt her greatly over the weekend. There's a good chance that voters will be skeptical of pat explanations about her health and any other statements she says about major topics. That could cost her the election.
There is a familiarity to this. Hillary went through a long list of excuses and prevarications about her private email server. For now, most people are accepting the pneumonia excuse but there are flaws in it. The official story is that she had only had a cough for a week but people were talking about it long before that. Then there's her detour to her daughter's apartment instead of a hospital. Someone with pneumonia collapses and doesn't go to the hospital?
Actually, the campaign was caught issuing a series of excuses. First they said that Hillary was dehydrated. Then they said that she had pneumonia. But they kept falling back on the dehydration excuse, too.
But that's minor compared to September 11 when Hillary left a 9/11 commemoration early and was seen collapsing while waiting for her van. After weeks of denying that Hillary had any health problems, the campaign was caught in a lie - again.
A phrase like Basket of Deplorables isn't going to mobilize the Left but the Right won't forget it.
Given the low bar that the left has for labeling people as racists, homophobes, xenophobes, and islamiphobes, a lot of possible voters are going to assume that Hillary included them. Not the proper action for a close election that needs to attract voters from the other side.
Very few people are actually planning on voting for Hillary Clinton or Donald Trump. They will be voting against the worst candidate. Over the past weekend, Hillary made her case for being the worst.First it came out that she's been saying that half of Trump's supporters are a "basket of deplorables". She later had to back off from that, saying that she had over-generalized. This did not stop her supporters from doubling down and insisting that she'd lowballed the figure when she said that 1/2 of Trump's supporters (and 1/4 of the nation) are irredeemable racists.