These sources have minimal bias and use very few loaded words (wording that attempts to influence an audience by using appeal to emotion or stereotypes).  The reporting is factual and usually sourced.  These are the most credible media sources. See all Least Biased sources.

Factual Reporting: HIGH

Notes: Vote Smart, formerly called Project Vote Smart (PVS), is a non-profit, non-partisan research organization that collects and distributes information on candidates for public office in the United States. It covers candidates and elected officials in six basic areas: background information, issue positions (via the Political Courage Test), voting records, campaign finances, interest group ratings, and speeches and public statements.  Vote Smart does not accept contributions from corporations, labor unions, political parties, or other organizations that lobby, support or oppose candidates or issues.  This is a solid resource. (D. Van Zandt 7/22/2016)

Source: http://votesmart.org/