“As regular NRO readers will know, one of the key races that Republicans need to win in order to retake the U.S. Senate is occurring in Arkansas, where Representative Tom Cotton is challenging Democratic incumbent Mark Pryor. The race to replace Cotton in the House of Representatives, while not nearly as consequential, is also quite interesting, because a central issue in that campaign is the fact that the Republican-led state legislature worked with the Democratic governor to implement Obamacare’s Medicaid expansion.”