Do not get me wrong, I am not predicting the Senate will flip to a Democratic majority. However, I am not alone in seeing increasing prospects for that outcome — or for Democrats to at least maintain the current 49-51 split during an election cycle in which they must defend a disproportionate number of red states (e.g., Montana, North Dakota, Indiana) and purple states that President Trump won in 2016 (e.g., Pennsylvania, Ohio).