Twitter says Sunday's presidential debate was the most tweeted ever, with more than 17 million tweets related to the forum sent. Sunday also became the most tweeted day of the 2016 presidential election, with nearly 30 million tweets sent.

The most tweeted moment of the Sunday night debate, which followed a town hall format, was when Trump said he disagreed with his running mate, Mike Pence, over his Syria policy. The No. 2 most tweeted moment was when Trump called himself a gentleman, and the No. 3 most tweeted moment was when Trump said he would jail Clinton in a Trump administration.

Trump had the largest share of Twitter chatter during the evening with 64 percent of the conversation, compared with Clinton's 36 percent of the conversation.

Clinton's Twitter following grew by 25,000 during the 90-minute debate, while Trump added 16,000 new Twitter followers.