 Has very little role at the White House, typically speaking. He doesn't join calls with the president. He's usually not around. Famously, when Dwight D. Eisenhower, who, again, was another older president who actually suffered a heart attack in the late stages of his presidency. When he had Vice President Richard Nixon as his VP and Nixon was running for the presidency. He was once asked what major input Nixon had had on his presidency and he couldn't come up with any. That's fairly normal. The VP usually doesn't have all that much say in policy at the White House.