President Obama’s former doctor says Democratic Party nominee Hillary Clinton should have a neurological exam, indicating the checkup would ensure she isn’t losing her cognitive abilities due to her history of brain injury.Dr. David Scheiner, Obama’s doctor for 22 years Dr. David Scheiner, Obama’s physician for 22 years, told CNN Tuesday that a two-page note Clinton provided from her doctor after follow-up testing in 2013 is simply not enough to show she’s fully recovered.“There are a number of questions I have. First of all, she’s almost 68 years old. While I think that medical letter was well written and was very professional … it’s not enough. For example, she is on Coumadin, a medication to prevent blood clots. You have to monitor that. It says she’s being monitored regularly. I’d like to know how well she is being controlled. That’s a difficult drug to use.