In these summer days of heated political turmoil, it was not the usual clash on Capitol Hill. Del. Eleanor Holmes Norton (D-D.C.) had set out early to shop at Eastern Market on Sunday, unsure whether she might be busy later in the day amid further developments in the debt ceiling debate. About 9:30 a.m., Norton was driving home in her gray Ford Fusion hybrid, with the telltale license plate EHN1.