Florida would definitely have (would?) benefited from a massive ad blitz by the DSCC.
At the expense of how many other seats?
I agree. Florida is an expensive state. A massive ad blitz for a state like Florida would be something along the lines of at $10 million, if not even breaking $20 million. If Hillary wins, I think she needs to begin her oppo research immediately and discredit and destroy him if he attempts to run against her in 2020. Truthfully though, I think Rubio's best opportunity for the Presidency is to wait until 2024. If he could gather more experience and get his name on a major piece of legislation under a Clinton Presidency, such as immigration reform, he'd be the most formidable opponent.