So the argument is that ICE doesn’t have enough manpower for this strategy to work across the US, and attempting to use ICE this way could backfire and result in stronger Democratic wins like we saw in Minnesota.

But with how divided America’s 2-party system is, they don’t need manpower. The need the projection of power in a few very select locales that will swing the overall vote in the correct direction. They can very easily steal the executive branch that way (thanks electoral college), and most likely the key house and senate seats they need as well.