President Trump is taking charge on immigration with less than a week to go before the midterm elections, after nearly two years in office that showed many conservatives that Congress is incapable of handling the issue.

Trump seized on the approach of a caravan of several thousand people headed toward the southern U.S. border by promising they wouldn’t enter the U.S., deploying thousands of troops to back up that pledge and vowing to unilaterally make it harder for people to seek asylum.