According to theblaze.com, the Democratic Senatorial Campaign Committee is pulling all of it's remaining ad reservations out of Florida. Because of this, Democratic candidate, Patrick Murphy will have to finish out his campaign for senator with the money he can raise by himself. Politico stated that the decision to pull the funding came prior to the debate, which Rubio was widely believed to have won. The DSCC has not admitted that they pulled the funding because of Murphy's performance in the debate Monday night, but rather claimed that it was a strategic decision designed to give Democrats the best possible chance to retake the Senate.
http://www.theblaze.com/stories/2016/10/18/democrats-pull-funding-from-florida-senate-race/