A different way to look at Hillary Clinton is to realize that she has spent more time in the White House at the center of power than anyone in American history, except Franklin D. Roosevelt.
Roosevelt was elected four times, and died in the early months of his fourth term, a total time of 12 years 39 days.
Well, Hillary was married to Bill Clinton, and was intimately engaged in the events of that 8 year Presidency.
She also was deeply immersed in foreign policy with the White House under Barack Obama, as his Secretary of State for four years.
So Hillary Clinton has been in or around the Oval Office for twelve years, and therefore, has had more time in that environment than anyone except FDR, who she would surpass in time by the beginning of March 2017.
No one has ever had this kind of experience, along with eight years in the Senate, in all of American history.
So Hillary Clinton is superbly qualified for the Presidency, while no one is claiming that she is perfect, but no one running this year for President is such, and none in our entire history as a nation.