'The entire electoral pool has changed': Top GOP pollster says Harris may deliver Dem trifecta

One Republican polling and messaging expert is warning his party that if current trends hold, Vice President Kamala Harris may end up not only winning the White House, but also delivering majorities for Democrats in both chambers of Congress.

In a recent CNBC interview with Squawk Box, pollster Frank Luntz — who NJ.com regarded as "the Nostradamus of pollsters" — remarked on the jarring shift in momentum for Democrats between President Joe Biden's late June debate with former President Donald Trump and the emergence of Harris as the Democratic Party's standard-bearer in November. Luntz, who routinely conducts focus groups of swing voters in battleground states, noted that Harris is particularly strong with so-called "double haters" who were not excited about the prospect of a 2020 rematch.