The sources below are almost entirely submarine articles, but that's how trends arise. Remember hearing about ransomware attacks in the news? That was a purposeful choice a group of Cybersecurity companies chose to begin drumming up from 2019 onwards.

Govt Specific:

Government Tech Acquisition - https://www.nextgov.com/

GSA Specific - https://www.govexec.com/

DoD Policy and Acquisition - https://www.defenseone.com/

SLED Acquisition - https://www.route-fifty.com/

Hill specific stuff (ignore Magazine, Opinion, and Personal Profile articles, those are all submarine articles) - https://www.politico.com/

Cybersecurity Industry:

DarkReading (almost entirely submarine articles, but a good way to get a pulse on upcoming cybersecurity trends) - https://www.darkreading.com/

SDxCentral (same as darkreading, but better brand) - https://www.sdxcentral.com/

Media/News:

Poynter - https://www.poynter.org/

Columbia Journalism Review - https://www.cjr.org/