Tireless maverick

Sen. John McCain, at 71, is the oldest presidential candidate in the field. But you wouldn't know it by the schedule aboard the Straight Talk Express, the bus he uses to traverse icy New Hampshire. One recent night, at a gathering near Nashua, he spent two hours answering every question on topics ranging from Iraq and immigration to global warming.

He is liberal in his use of Ronald Reagan quotes and criticism of his own Grand Old Party, especially over the congressional practice of larding budgets with money for pet projects. McCain holds forth at the rear of his bus between stops at town hall gatherings. Any topic is open. He dishes about people who hold or held high position and spices the exchanges with banter.