They certainly liked the distraction, but the invasion of MN allowed them to 1) catch some illegal immigrants, 2) intimidate legal immigrants, encouraging them to "self deport", 3) flex their power and demonstrate the ability to cause pain and harm to political enemies, and 4) give agents practice and training for the next city they invade. So far they have had these "surges" in Los Angeles, Chicago, Portland, and Minneapolis. There are plenty more cities in blue states and plenty of money left in their budget, and almost 3 years left in this administration.