Roll Call: “Trump and Biden’s 2020 challenge: 3 percent or bust”

In today’s Roll Call the Winston Group’s David Winston writes about polling and election results with some historical perspective.

When looking at presidential polls, there is a number that matters — 3. I call it the 3 percent factor. When the race is at or under 3 percent, the head-to-head ballot test in national polls is not necessarily a clear predictor of who will ultimately win the presidency, and state polls are probably a better indicator of the race. But history tells us that when one candidate’s lead goes above 3 percent nationally, the size of the lead is likely to produce both at least a plurality in the popular vote and a win in the Electoral College.

Read the full piece here.