Republicans in Ohio will determine on Tuesday what the degree of difficulty will be for swing-seat Democrats trying to keep their jobs on Capitol Hill.
A change of Senate control is within the grasp of the GOP and a flip of the narrowly divided House is achievable by Democrats this fall, so the attributes of candidates who make it onto the November ballot is an important barometer of the downballot races ahead in this presidential election year.
In addition to the closely watched battleground races, Tuesday will bring special elections in Ohio and California, plus some primaries that will test ...