JAMA Internal Medicine has some data which I would have predicted–doctors are less likely to support Republicans now than in the past. The data is based upon campaign contributions and therefore has no data regarding reasons for the change. This data would not include contributions under $200 and it is not known if those making smaller donations differ from the larger, reportable contributions.
The study found that since 1996 contributions to Republicans by physicians have decreased, dropping to under 50 percent leading up to the 2008 election. Many of the results suggest that doctors are contributing based upon factors comparable to the general population. This includes a significant gender gap with 57 percent of men and 31 percent of women contributing to Republicans over the entire study period. Leading up to the 2012 election, 52.3 percent of male physicians contributed to Republicans and 23.6 percent of female physicians contributed to Republicans.
I am apparently an exception to the trend that male physicians and physicians in solo or small practices are more likely to contribute to Republicans. Another trend mirrors the general population with those earning more being more likely to contribute to Republicans.
Overall the trend against support for Republicans is similar to the overall trend for more highly educated people to be less likely to support Republicans. The education in science might make many physicians more likely to reject Republicans in recent years as scientists have tended to oppose Republicans. Many people trained in science would have a difficult time supporting a party in which many believe in creationism, and most reject the view of 97 percent of climate scientists on global warming.
The study is unable to determine whether medically related issues have any bearing on the results. Democrats have been far more supportive of health care in recent years, but I also find that many of my colleagues get their news from Fox and have the same misconceptions about the Affordable Care Act and other issues as Republicans in general have. On the other hand, many physicians, along with many physician organizations, have been highly supportive of Obamacare after having seen the serious problems in health care delivery in this country. Republican policies would also be terrible for the future of Medicare, but I’m not sure how widespread this realization is among physicians.