There are 33 Republican governors in the U.S., just 16 Democrats, and a single independent (Alaska's Bill Walker). This decisive GOP advantage is in large part due to the major gains Republicans made throughout the 2010 and 2014 midterms of the Obama years. But in 2018, with President Trump looking more and more unpopular, many of these offices are now on a knife's edge. These gubernatorial races are critical — not just for the states themselves, but for national party control in the longer run.