H. RES. 265 is a resolution by the House of Representatives condemning the Trump administration for using the Signal messaging app to communicate highly sensitive or potentially classified information about a U.S. military operation. The resolution criticizes this use as a national security...
Simple Explanation
The House of Representatives wants to tell the Trump team that using the Signal app to talk about secret military stuff is a bad idea because it could get into the wrong hands. They are asking the team to make sure they use safer ways to talk about important secrets.