I read Powerline blogs through Reeder (https://reeder.app/) on macOS and iOS, an RSS reader. On iOS it works.
On macOS, I can get to the entries themselves, but when attempting to view links on the blogs, either from the RSS feed or the embedded browser, clicks send me to the www.powerlineblog.com needs to review the security of your connection before proceeding” page, with a checkbox for human verification, but clicking on it results in a loop.
This works from Safari on the same machine, at the same time, and last time I used a macOS machine, it worked, as well, probably only a few days ago.
On my most recent attempt, I tried clicking on the checkbox and blue human verification button at least 10 times but never got through. At the bottom of the page is Ray ID: 79b7ac2669561883.