Check out the following link, which I will explain below the fold:
Story on McCain
The Northern Storm Brigade of the Free Syrian Army are the people with whom John McCain met early in the Syrian civil war (see photograph in previous link). Sometime in 2013, they received money (in the low tens of thousands of dollars) from the Islamic State in exchange for Israeli-American reporter Steven Sotloff, who was beheaded last month. Apparently this was after some half-hearted confrontations between the two sides which ended with NSB concluding it could not fight the Islamic State because they were fellow Sunnis. Read the article again.
The Free Syrian Army will not do what we tell it to. There are no "moderate" Syrian rebels as civil war is not conducive to moderation (the Lincoln of 1864 was not a moderate by the standards of 1861). I will not support any candidate in 2016 who voted to arm the Free Syrian Army because it contains elements who make deals with the Islamic State. The idea that the Free Syrian Army will make the destruction of the Islamic State its top priority when they share the goal of removing Bashar Assad from power, is laughable.
It would be nice if we had an Attorney General (or a President) who was willing to make an example of John McCain. It would be interesting to see the impeachment fight that the President would endure if he arrested one of the most prominent Senators of the opposition party, but I think it's a battle we should be willing to wage. And given that President Obama has come over to John McCain's position on the Syrian rebels, I am willing to concede something I never have before. My vote to re-elect the President in the 2012 election was a mistake.