> Its is not just "some bias". Its every single day accessing to WaPo or NYT and have two dozens articles and news about Trump with negative connotation.
The existence of news articles that convey a negative impression of a person or organization, regardless of quantity, does not, in and of itself, indicate any bias, either in selection or presentation.
> There is an ongoing coup in Venezuela, with illegal arrests but somehow the very same Russian - Trump news remains more important.
The Washington Post and New York Times are US newspapers. The President of the US, and his close associates, involvement with Russian government is more important news for them than the auto-coup in Venezuela for the same reason that that auto-coup is more important in Venezuela than the Russia-Trump issue.