As Monica Davey reported in The New York Times on Friday, starting in January, “one party will hold the governor’s office and majorities in both legislative chambers in at least 37 states, the largest number in 60 years and a significant jump from even two years ago.”

As the National Conference of State Legislatures put it, “thanks to an apparent historic victory in Arkansas, Republicans gained control of the old South, turning the once solidly Democratic 11 states of the Confederacy upside down.” Arkansas will be the only one of these states with a Democratic governor.

As Davey’s article pointed out, single-party control raises “the prospect that bold partisan agendas — on both ends of the political spectrum — will flourish over the next couple of years.” But it seems that “both ends of the political spectrum” should not be misconstrued as being equal. Democrats may want to expand personal liberties, but Republicans have spent the last few years working feverishly to restrict them.

According to a January report from the Guttmacher Institute: “By almost any measure, issues related to reproductive health and rights at the state level received unprecedented attention in 2011. In the 50 states combined, legislators introduced more than 1,100 reproductive health and rights-related provisions, a sharp increase from the 950 introduced in 2010. By year’s end, 135 of these provisions had been enacted in 36 states, an increase from the 89 enacted in 2010 and the 77 enacted in 2009.” Almost all the 2011 provisions were enacted in states with Republican-controlled legislatures.

According to the Brennan Center for Justice at the New York University School of Law, at least 180 restrictive voting bills were introduced since the beginning of 2011 in 41 states. Most of the states that passed restrictive voting laws have Republican-controlled legislatures.

An N.C.S.L. report last year found “the 50 states and Puerto Rico have introduced a record 1,538 bills and resolutions relating to immigrants and refugees in the first quarter of 2011. This number surpasses the first quarter of 2010 by 358.” That trend slowed in 2012 in large part because of legal challenges. Many of the states that had enacted anti-immigrant laws or adopted similar resolutions by March of last year, again, had Republican-controlled legislatures.

We are moving toward two Americas with two contrasting — and increasingly codified — concepts of liberty. Can such a nation long endure?