Tendentious

Near-synonyms: partisan, slanted, partial, prejudiced

That he was a supporter of the cause was clear, because his reports from the front were tendentious.

President-elect Donald Trump abruptly abandoned some of his most tendentious campaign promises Tuesday, saying he does not plan to prosecute Hillary Clinton for her use of a private email system or the dealings of her family foundation, has an “open mind” about a climate-change accord from which he vowed to withdraw the United States and is no longer certain that torturing terrorism suspects is a good idea.

It is a canard trotted out by lazy or tendentious journalists that nationalised British Railways lacked entrepreneurial flair.