from nine-point Democratic advantage to five-point GOP edge

"In the fourth quarter, party support flipped as Republicans made gains, from 44% to 47%, and Democratic affiliation fell from 45% to 42%. These fourth-quarter shifts coincided with strong GOP performances in 2021 elections, including a Republican victory in the Virginia gubernatorial election and a near-upset of the Democratic incumbent governor in New Jersey. Biden won both states by double digits in the 2020 election." "The GOP has held as much as a five-point advantage in a total of only four quarters since 1991. The Republicans last held a five-point advantage in party identification and leaning in early 1995, after winning control of the House of Representatives for the first time since the 1950s. Republicans had a larger advantage only in the first quarter of 1991, after the U.S. victory in the Persian Gulf War led by then-President George H.W. Bush." U.S. Political Party Preferences Shifted Greatly During 2021