to many white southerners' racial grievances in order to gain their support. This top-down narrative of the Southern Strategy is generally believed to be the primary force that transformed Southern politics following the civil rights era. Scholar Matthew Lassiter argues that "demographic change played a more important role than racial demagoguery in the emergence of a two-party system in the American South". Historians such as Matthew Lassiter, Kevin M. Kruse and Joseph Crespino, have presented an alternative, "bottom-up" narrative, which Lassiter has called the "suburban strategy." This narrative recognizes the centrality of racial backlash to the political realignment of the South, but suggests that this backlash took the form of a defense of de facto segregation in the suburbs rather than overt resistance to racial integration and that the story of this backlash is a national rather than a strictly southern one. The Party's 21st-century base consists of groups such as white voters; particularly male, but a majority of white women as well, heterosexual married couples; rural residents; and non-union workers without college degrees, with urban residents, ethnic minorities, the unmarried and union workers having shifted to the Democratic Party. The suburbs have become a major battleground. According to a 2015 Gallup poll, 25% of Americans identify as Republican and 16% identify as leaning Republican. In comparison, 30% identify as Democratic and 16% identify as leaning Democratic. The Democratic Party has typically held an overall edge in party identification since Gallup began polling on the issue in 1991. In 2016, The New York Times noted that the Republican Party was strong in the South, the Great Plains, and the Mountain States. The 21st century Republican Party also draws strength from rural areas of the United States. In recent years, the party has made significant gains among the white working class, Hispanics, and Orthodox Jews while losing support among most upper-class and college-educated whites. Rise of Political Polarization Towards the end of the 1990s and in the early 21st century, the Republican Party increasingly resorted to "constitutional hardball" practices. A number of scholars have asserted that the House speakership of Republican Newt Gingrich played a key role in undermining democratic norms in the United States, hastening political polarization, and increasing partisan prejudice. According to Harvard University political scientists Daniel Ziblatt and Steven Levitsky, Gingrich's speakership had a profound and lasting impact on American politics and the health of American democracy. They