WASHINGTON — While there are many uncertainties, one sure thing about Tuesday’s primaries in five states is that at least one House incumbent will lose the chance to be in the next Congress. That’s because Democratic voters in one Michigan district have to choose between two incumbents. But other sitting House members are also in jeopardy on Tuesday, and numerous other primaries will pick nominees for competitive races, especially against members of the Democrats’ “Frontline” program for incumbent protection.
Here are five questions that will be settled after Arizona, Kansas, Michigan, Missouri and Washington vote.
Who survives the member-member face-off?
