A video emerged on Sunday of Clinton, showing the dramatic moment when her "knees buckled" and she nearly crumpled to the pavement while waiting for her official car to collect her. Now top sources in the Democratic party circle are thinking of lining up a replacement. Could this be the 'October surprise' American political analysts take about during elections?
Top Democrats are reportedly scared that Clinton might die before the election or after the election and do not want their party's chances to be put in jeopardy.
Emmy Award winning New York Journalist and MSNBC pundit David Shuster tweeted: "Clarification from dem operatives @HillaryClinton pneumonia: Expect emergency DNC meeting to CONSIDER replacement."
Another senior democrat also revealed to Express UK that while the committee may "plead" with Clinton for her to step down, the decision is ultimately down to her.
"We can make contingencies, argue, plead with Hillary Clinton, but DNC bylaws are clear – her nominee status is now totally up to her."
US journalist Rick Levanthal of Fox News said: “She unexpectedly left early because of what appeared to be a medical episode.
"I have a law enforcement source who was there, who was 15 feet away form Hillary Clinton. He said she was standing on a curb with her protective detail waiting for her motorcade.
"They were surprised to see her because she wasn't meant to be leaving yet.
"When it finally rolled up my source said she stumbled off the curb, appeared to faint, lost one of her shoes, which wound up under the van."
If Hillary Clinton is replaced, then Donald Trump will surely be the next President, because getting voter confidence, trust and belief is not something that is achieved in two months.