Is there is such thing as national US news site that is not politically biased?
Wire services are as close as you're going to get. Agence France-Presse, Associated Press, Reuters. They're in the journalism business. They get news and then sell it to all of the "news" companies that then smear their bias all over it to make their readership more outraged, smug, happy, whatever emotions get them the most riled up and likely to keep coming back.