Pentagon leaders installed as part of Trump purge last month blocked DC National Guard from getting riot gear and ammunition as protesters descended on Capitol. https://www.washingtonpost.com/national-security/trump-protests-washington-guard-military/2021/01/07/c5299b56-510e-11eb-b2e8-3339e73d9da2_story.html?tid=ss_tw
Maryland Governor Larry Hogan received a panic call from lawmakers begging him to send in the Maryland national guard to defend Congress. He says he tried but was told repeatedly he didn’t have the authorization needed from the top. https://www.washingtonpost.com/dc-md-va/2021/01/07/capitol-protests-dc-live-updates/#link-EF65NBEEYNEDZHPSTUC5H7VD34
There had been plenty of warnings. Plenty of time to prepare. Plenty of money to do it. But twice the Capitol Police turned down offers of assistance - once three days before the pro-Trump riot at the Capitol and again as the mob descended on the building. http://apne.ws/ifiRKkO