OTOH, there are those in the middle of the democratic party wondering why Trump has not acted. Letting America burn is on his watch. They would actually support federal intervention at this point. They understand anarchy and marxism and are not anarchists and marxists. Trump's jawboning isn't action. It's inaction. A true leader would stomp these felons into the ground.
He's allowing democrat mayor and governors to show their constituents just how deep the rabbit hole of leftism goes if unchecked.
They're free to ask for federal assistance at any time they desire.
I think it's more that part of the rationale for the rioting would be to get Trump to send in the feds so that they can say, SEE? We told you he was a totalitarian dictator. They pulled that one out when he sent Feds to Portland to protect the federal buildings. But also, I do think there are some limits to what he can do federally. It's clear cut if they ask for help. If they don't, it's more complicated. But it's working out against the Democrats anyway. America is watching them and that's hurting them more than it's hurting Trump.