When it comes to the presidency, beyond the constitutional requirements, it seems to me that being qualified is just having enough political and leadership on your resume that people don’t ask if they’re qualified enough. In Clinton’s case, I think her time in the senate and as Secretary of State will satisfy that for most people. Beyond that, I think she has a unique qualification of having been the wife of a governor and former president. That said, that she doesn’t have that experience herself, I don’t think it counts for as much as actually having been governor. So, frankly, I couldn’t call her the most qualified ever, but she is in a unique position.
If anyone does decide to attack her resume, which I think is a lost cause, I think it will be more about how much her marriage really counts for and, of course, various things on her record. But I don’t think it will count for much since, she’s definitely more qualified than Obama was, and while it was somewhat of an issue with him, it didn’t count for much.