It's actually even less all the president can do is some control over foreign policy and nominates Supreme Court Justices. Some Republican s are already saying they're going to block all of her choices for the next four years if she wins for the Supreme Court so even that might be off the table for what the president can do. They've already been blocking Obama for a year on this. To get anything major done they have to get through Congress and Congress has done nothing for the past six years no matter who wins that's unlikely to change.