Can the G.O.P. Senate Majority Survive Donald Trump?
The party’s most vulnerable down-ticket candidates try to escape the shadow of a presidential campaign that is imperiling their prospects in November.
By ROBERT DRAPER
On a Sunday morning in early June, Senator Mark Kirk rolled into an uptown Chicago bar in his wheelchair to take part in the city’s 47th annual L.G.B.T. Pride Parade, wearing a red polo shirt, charcoal khakis and the abashed half-smile of a 56-year-old man who has already assessed his long odds of blending in. He hoisted himself up and made his way into the crowd, leaning on the cane he has used since suffering a severe stroke four years ago.