The Senate six: These pitched battles will decide which party wins majority

The battle for Senate control will hinge on campaigns in any one of six states, maybe seven, as Republicans aim to net the single seat they need to reclaim the majority in the midterm elections.

Democrats are defending the barest of advantages. Their rule over the evenly divided, 50-50 Senate exists courtesy of the tiebreaking vote Vice President Kamala Harris wields in her constitutionally designated role as Senate president. That leaves Democrats little room for error in a 2022 election cycle shaping up as a Republican wave and correspondingly leaves the GOP multiple options to reach...