There are more tea party vs. establishment primaries tonight.
Politico notes that if Sen. Pat Roberts (R-KS) and Sen. Lamar Alexander (R-TN) win today, “this will be the first cycle since 2008 in which no incumbent senator loses in a primary.”
Harry Enten says Alexander and Roberts “are heavy favorites to win their primaries this week against conservative challengers, but the data from past primary challenges suggest that Alexander has a higher chance of being upset.”
Roll Call has 6 things to watch as results come in.
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