Christine Quinn, the Democratic Choice Ms. Quinn, the City Council speaker, offers the judgment and record of achievement anyone should want in a mayor. Two opponents—Bill de Blasio, the public advocate, and William Thompson Jr., former comptroller—offer powerful arguments on their own behalf. But Ms. Quinn inspires the most confidence that she would be the right mayor for the inevitable times when hope and idealism collide with the challenge of getting something done. … For Republicans, Joseph LhotaYou might find it odd to see this page endorsing the mayoral candidacy of Joseph Lhota, a Republican who made his mark in...