In an op-ed in Tuesday’s New York Times, Sen. Charles E. Schumer of New York called for an end to partisan primaries and the implementation of a top-two system nationwide, asserting that such a change would lessen the historic level of polarization between Democrats and Republicans. …
Here’s the problem with Schumer’s argument: There isn’t much evidence to support it. Let’s look at California, which adopted the top-two primary via a 2010 constitutional amendment, as an example. CONT.
Harry Enten, FiveThirtyEight