@izzythepush,
Let's not forget that Flynn is still hanging out there. He's sure to be charged as well, and neither Trump nor Pence can plausibly deny that they knew all about his problems before he was brought on board. There's no way they can keep this thing at arm's length, and they know it.
Why do people think Manafort was hired, to be campaign manager of all things? He had little experience doing so. No real connections in Washington that would have helped run the campaign. He was, however, highly connected... in Russia and Ukraine.
Cycloptichorn