So 9% are undecided?
The number of undecided in a poll depends on whether the poll-taker presses people into a choice. Some polls do not press likely voters into making a choice, and not many polls report leaners.
In the Bloomberg poll released yesterday, in the four-way, WITHOUT leaners, 1 percent volunteered they would not vote, and 6 percent said they were not sure. (This is kind of funny because this was a likely voter poll, and 1 percent of likely voters said they would not vote for President. Presumably, they’d still vote for Gov., Sen., and Cong. and whatever other offices are on the ballot.) Bloomberg than asked a follow-up, to whom do you lean? And, 1 point shifted from not sure to each of Hillary and Trump. So, the percentage of undecideds we can say is 4 to 7 percent, depending on whether you include leaners and abstainers, in addition to true undecideds.
Speculatively, if Trump is 2 points ahead, and if he picks up a net of 4 points from undecideds and net of 4 points from peel-off from the third-party candidates, he would amass a 10 point lead. There are a lot of “ifs” in this statement. It’s kind of a best case scenario for Trump.