Ridge is wrong. Very wrong.
John McCain is 71 years old. If elected, he would be the oldest man to take office as President of the United States. The possibility of his selected V.P. taking over the presidency is significant - so significant that Ridge's assurances that any vice president would defer to the president's opinion is insufficient.
Because of the very real possibility that McCain's vice president could assume the presidency, McCain cannot name a pro-"choice" running mate. Not without turning off a huge chunk of the Republican voting base (me included) and giving the election to Barack Obama anyway.