WASHINGTON | As fellow Republicans slipped into a room in the Capitol for a private meeting, Arizona Sen. John McCain held court outside, surrounded by a flock of reporters. ” What about you, jerk?” he teased Kasie Hunt of NBC News, who gave it back: ” Do you take offense to the term ’Old Bull?’?” McCain’s eyes lit up and he laughed. ” Is that Sen. McCain? Oooooh,” Sen. Charles Schumer, D-N.Y., who was passing by, whispered in faux awe. The 76-year-old, twice-failed presidential candidate is back in front, reprising his role as a bipartisan dealmaker, occasional irritant to his...