Jamieson, Fausset and Brown on Micah 1:9

9. wound ... incurable--Her case, politically and morally, is desperate (Jr 8:22).

it is come--the wound, or impending calamity (compare Is 10:28).

he is come ... even to Jerusalem--The evil is no longer limited to Israel. The prophet foresees Sennacherib coming even "to the gate" of the principal city. The use of "it" and "he" is appropriately distinct. "It," the calamity, "came unto" Judah, many of the inhabitants of which suffered, but did not reach the citizens of Jerusalem, "the gate" of which the foe ("he") "came unto," but did not enter (Is 36:1;37:33-37).