The Duck of Minerva is a good blog, with contributors who are at the level of full professors at leading universities https://www.duckofminerva.com/
Political Science Quarterly can be fantastic, though being a quarterly, won't be tackling news from the last 24 hours (but I think we have enough of that).
For a different perspective, the Lowy Interpreter blog at Australian think tank The Lowy Institute, has excellent, expert analysis from a often strikingly different geopolitical point of view: https://www.lowyinstitute.org/the-interpreter
Other non-partisan think tanks can be a great source. U of Pennsylvania has a ranking of them which, while I wouldn't take verbatim, can provide a good starting point.