RealClearPolitics media bias rating is Center.

RealClearPolitics is a political news and polling data aggregator based in Chicago, Illinois. The site's founders say their goal is to give readers "ideological diversity". Politico Executive Editor Jim VandeHei has called the site "an essential stop for anyone interested in politics."

The site was founded in 2000 by former options trader John McIntyre and former advertising agency account executive Tom Bevan. Forbes Media LLC bought a 51% equity interest in the site in 2007.[8] RCP has expanded to include a number of sister sites.

Source: Wikipedia
http://en.wikipedia.org/wiki/Real_clear_politics

See how we rate the media bias of other news outlets and writers.

The AllSides Media Bias Rating reflects the average judgment of the American people.

The AllSides Media Bias RatingTM reflects the average judgment of the American people. We don't use a convoluted mathematical or artificial intelligence model, but instead have regular people representing the broad spectrum of Americans blindly rate the bias of articles. That produces a fair, verifiable bias rating.

This media bias rating was determined using the following levels of bias verification.

Basis of Rating:

Blind Survey
Third Party Data
0
Community Feedback
0
Editorial Review
0
Secondary Research

Confidence Level:

Not Available

Unless otherwise noted, this bias rating refers only to news articles on their web site, not from opinion pieces or what is broadcasted on TV or radio. The opinion writers from the same media source may have different bias ratings, so individual writers often are rated separately.