What’s your evidence that they delegate it to her, a registered Independent?

EDIT: You have been debunked. In your words later in this comment thread you stated that the person who has been delegated the local WaPo political endorsements is “Jo-Ann Armao is the editor covering local politics.”

The woman in question penned an article defending Planned Parenthood in 2015: https://www.washingtonpost.com/blogs/post-partisan/wp/2015/07/15/dont-rush-to-judge-planned-parenthood/ .

And also voted for Hillary Clinton: https://www.washingtonpost.com/blogs/post-partisan/wp/2016/11/08/win-or-lose-clinton-has-done-something-remarkable/ . So yeah, not a Republican.