Good news—thanks!
How many days do they include in their sample, and so how great was the difference in last night’s contribution?
Hope this answers your question:
"Every day, we invite one-seventh of the members of the UAS election panel to answer three predictive questions: What is the percent chance that… (1) you will vote in the presidential election? (2) you will vote for Clinton, Trump, or someone else? and (3) Clinton, Trump or someone else will win? As their answers come in, we update the charts daily (just after midnight) with an average of all of the prior week’s responses."
7 days, so the difference between the day falling off and the last day must have been 1.5% * 7 = 10.5% advantage for Trump.