Why is the executive branch responsible for enforcing the law? Gee, that sounds like a question that answers itself, isn't it? The only law enforcement that the legislature controls is the Capitol Police, and those guys were present but completely overwhelmed. If withholding the National Guard long after it became apparent that they were needed was the only issue, we would barely be having this conversation.
Trump's the one who told the lies which motivated that attack. His administration contacted the militias which attacked the capitol, even going so far as to offer "blanket pardons" in advance through intermediaries. My dude even tried to dismantle some of the security measures available at the time, and expressed varying degree of support for the effort to hang Mike Pence during and after the fact. If you still think he didn't want this, I've got some beautiful beachfront property to sell you in North Dakota.
