Before moving into the White House, President-elect Trump needs to double check the Oval Office for trip wires. His predecessor has spent the last month setting traps to ensnare the new administration.

President Obama has more on his mind than an effort to solidify a legacy and nail down policy. He has adopted a guerrilla strategy designed to defame and debilitate. Inherently political, it’s administrative sabotage by extra legislative means and it threatens to hobble Trump.