It's important to note that the opposition to the USA Freedom Act contains two distinct factions: The so called "defense hawks" led by Mitch McConnell, who want

It's important to note that the opposition to the USA Freedom Act contains two distinct factions: The so called "defense hawks" led by Mitch McConnell, who want to renew section 215 Patriot Act (that is to say they want bulk collection to continue) and the Rand Paul camp, who say that the USA Freedom act doesn't go far enough and are happy to let section 215 lapse without any replacement.