I took my senior level college stats course from one of his staff. The prof was pretty good herself but in awe of how good Wirthlin delivered and delivered consistently, within 1/2 of 1%!
Best story ever is that Wirthlin told Reagan he was within a 0.5% margin to sweep all 50 states in 1984 and 1-2 visits to Minnesota would do it. Reagan brushed him off as his schedule was full trying to pull congressional candidates over the finish line. But he did finally agree to schedule a "refueling stop/campaign rally" in Rochester, Minnesota on election eve en route back to California.
Rochester because it was in the southeastern corner of the state and the short speech would be delivered in time for the 10 pm news. Mondale's final margin: 0.18% or 3,761 votes in HIS HOME STATE where Mondale had never lost an election (until he stood in for Paul Wellstone some 18 years later).
Emerson College is based in Boston, MA.
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Their polling is managed/ran by a group of students
that is overseen by a professor. Not that it can’t
be accurate but time will tell on Texas. Beto isn’t
going to defeat Cruz. It may be a closer race than
the governor race but Cruz will win.