It's the first time in U.S. history a presidential candidate has not revealed his tax returns, or a president.I think that the poll ratings are in the gutter right now, right? Donald Trump's, even before he's been inugurated.

The extraordinary thing that we saw here is the incoming national security adviser, Michael Flynn, basically having a text messages back and forth with the Russian ambassador to the United States.

On issue after issue, the polls - and these are not snapshot polls; these are polls over a consistent period of time - show that most Americans share what one could call core liberal or progressive values: investment in health care and education over tax cuts; fair trade over free trade; corporate accountability over deregulation; environmental protection over laissez-faire policies; defending Social Security and Medicare over privatizing them; raising the minimum wage over eliminating it. The country prefers progressive alternatives to the failed policies of the conservative right.

Those poll ratings go south, I think you have a Republican Party ready to begin different kinds of hearings than [Jason] Chaffetz is unwilling to have.

Obamacare is benefiting [Donald] Trump supporters.

I am concerned that Donald Trump walks into the White House a walking conflict of interest in violation of the emoluments clause of the constitution, and the Stock Act. It is important to investigate whether there are financial levers, not just Russia - China, the Emirates. Because he will never make America great again - I don't believe he ever will, but he will not do so if he's beholden to.

I think it is a good thing that the United States will now be a party to the talks, to resolve a metastasizing crisis in Syria, which will destabilize Europe.