Assign Category to Entire Site

I don’t see why assigning post with one extra category will mess up permalink structure. But anyway if you really like the theme and do not want to assign extra category, we can modify the theme (via Child Theme).

Once we have a blank child theme (with one empty stylesheet) working properly, just copy over this file into child theme folder

liveblog/template-parts/featured-posts.php

Look at line#5 here, just change the WP_Query parameters to our own
https://themes.trac.www.ads-software.com/browser/liveblog/1.0.13/template-parts/featured-posts.php#L5

WP_Query
https://codex.www.ads-software.com/Class_Reference/WP_Query

Thanks, Paul!
Let me try to do the additional category. As long as it doesn’t mess up the permalink structure, I’m fine. I’ll reach out again about the child theme if I have issues.