POTUS and the US Army will not allow a siege of the WH by a bunch of Marxist revolutionaries.
I would bet my life on it.
That's a poor bet by including the US Army or any DoD elements in it. The generals want Trump gone as bad as the democrats and BLM. They've already laid down markers that they won't follow orders from the CINC. It's no longer your dad's or your army/navy/air force/marines.
I saw Occupy Wall Street in Portland 2012. They were filthy and were basically using the Beautifully maintained downtown parks as a toilet. They seemed more like Dead-Heads without a band to follow once Jerry ODed. Never really saw the sect that is now antifa but my understanding from locals is that the nastiest anarchists live there and are mercenaries contracted to produce mayhem no matter the location. For example, GHB campaign stop in Seattle 1989. They don’t call it little Beirut for nothing.
Also, Portland is the epicenter of corruption and is the A1 destination for extremely ethically-compromised minorities on the move in various govt. capacities. I’ve seen the disgraced former director of Multnomah Co. Public Schools move from Atlanta to Portland and immediately started fleecing the county as if a birthright as he picked up on the white guilt groveling. Oh, and Chief Moose from the DC sniper investigation came to DC out of Portland. The primary problem with the populace is that most are missing either some or all core American values people from the east get innately. Kinda like a society of grifters.