Look up their biggest donors. The Koch Bros are right at the top using various entities of their corporation.
The "liberal" tag is purely nostalgic.

on CBS, NBC, ABC, CNN.

It's always Congress or the Government, never the Republicans.

In all the time they talked about things Obama couldn't do, they never say it was because the GOP blocked him.

as the main culprit and you are spot on. The media does not call it like it is with them. Ornstein and Mann are conservatives for anyone who does not know them.

Republicans Gone Wild: Q&A with Mann and Ornstein

Oct 14, 2015 12:47 PM EDT
By Francis Wilkinson

Political scientists Thomas Mann and Norman Ornstein are longtime scholars of American politics in general and the U.S. Congress in particular. They were among the first mainstream analysts, and arguably the most influential, to make the case that the "broken" condition of Washington is actually a manifestation of a single broken political party. After House Speaker John Boehner announced his resignation, I began an e-mail conversation with Mann, of the Brookings Institution and the University of California at Berkeley, and Ornstein, of the American Enterprise Institute, about the dangerous state of Congress.

WILKINSON

Gentlemen: During the last presidential election you published "It's Even Worse Than it Looks," which detailed how Republicans in Washington were abandoning political and governing norms and how partisan gridlock was growing increasingly intractable. In a much-quoted passage you wrote:

The Republican Party has become an insurgent outlier -- ideologically extreme; contemptuous of the inherited social and economic policy regime; scornful of compromise; unpersuaded by conventional understanding of facts, evidence and science; and dismissive of the legitimacy of its political opposition.

https://www.bloomberg.com/view/articles/2015-10-14/thomas-mann-and-norman-ornstein-on-republicans-gone-wild

responsible for where we are now. Their inability to call a spade a spade has totally misinformed most of their viewers and readers. The vaulted (?) NYT's refused for too long to call the turd a liar, using words like "falsehoods" to describe his lies. A falsehood is what you use to describe the lies of little children not grown men who are traitors.