So Bin Laden? We launched a military action to arrest & execute him that took place inside a friendly country.We don't have blanket legal authority to just arrest/kill people in foreign countries who we claim are members of terrorist organizations, either. Its a complex legal issue, and "arrest legality" is very much involved.
I supported the Bin Laden action. These are complex issues & we cannot oversimplify them. Sometimes Congress needs to be informed after the fact to maintain secrecy because there are a lot of competing agendas in Congress.