One of the least back-slapping presidents in recent memory may have finally found a way to bond with lawmakers — by treating them to the most exclusive upgrade in air travel. Since his party took brutal losses in the November elections, President Barack Obama has invited nearly 20 members of Congress to fly with him on Air Force One to state visits in India and Saudi Arabia, to Tennessee for the announcement of his free community college initiative, and to Nevada to promote his latest sweeping moves on immigration. Republican Sen. Lamar Alexander used last month’s flight to his home...