Southern Democrats felt chagrin at the national party's growing friendliness to organized labor during the Franklin D. Roosevelt administration, and began splitting their tickets as early as the 1930s. Southern demography also began to change. From 1910 through 1970, about 6.5 million black Southerners moved to urban areas in other parts of the country in the Great Migration, and demographics began to change Southern states in other ways. Florida began to expand rapidly, with retirees and other migrants from other regions becoming a majority of the population. Many of these new residents brought their Republican voting habits with them, diluting traditional Southern hostility to the Republicans. The Republican Party began to make gains in the South, building on other cultural conflicts as well. By the mid-1960s, changes had come in many of the southern states. Former Dixiecrat Senator Strom Thurmond of South Carolina changed parties in 1964; Texas elected a Republican Senator in 1961; Florida and Arkansas elected Republican governors in 1966. In the Upper South, where Republicans had always been a small presence, Republicans gained a few seats in the House and Senate. Throughout the 1970s and 1980s, the South was still overwhelmingly Democratic at the state level, with majorities in all state legislatures and most U.S. House delegations. Over the next thirty years, this gradually changed. Veteran Democratic officeholders retired or died, and older voters who were still rigidly Democratic also died off. There were also increasing numbers of migrants from other areas, especially in Florida, Texas, Virginia, Maryland, and North Carolina. As part of the Republican Revolution in the 1994 elections, Republicans captured a majority of the U.S. House's southern seats for the first time. As of 2021, they account for a majority of each Southern state's House delegation apart from Virginia, Maryland, and Delaware. Following the 2016 elections, when Republicans won the Kentucky House of Representatives, every state legislative chamber in the South had a Republican majority for the first time ever. This would remain the case until Democrats regained both Houses of the Virginia Legislature in 2019. Today, the South is considered a Republican stronghold at the state and federal levels. Some political experts identify a re-Southernization of politics and culture in the Clinton presidency coinciding with House and Senate leading positions held by southerners. West Virginia For West Virginia, "reconstruction, in a sense, began in 1861". Unlike the other border states, West Virginia did