Hunter Biden’s friend and lawyer Kevin Morris was blunt in laying out his thoughts at a strategy session last September on an expected onslaught of investigations by House Republicans: It was crucial, Morris suggested, for Hunter Biden’s camp to be more aggressive.

Since the government acknowledged last month that the Trump administration had lost track of nearly 1,500 immigrant children, the debate over what that means and who is to blame has roiled Twitter. A look at the partisan claims and a reality check behind the latest immigration fight.