What Might Jeff Sessions do as AG?

Many have criticized Trump's Sessions pick for AG based on his background, voting record, and prior statements. But, if confirmed, what might an AG Sessions actually do?

Roll back federal civil rights and voting-rights enforcement, tighten the screws on immigrants, increase surveillance, and enforce federal marijuana laws in states that have legalized marijuana, according to Politico; roll back civil rights, according to The Atlantic; seek harsh punishment for low-level crimes (among other things), according to the Brennan Center; and even "prosecute sanctuary cities," according to the Washington Times.

Sessions has his defenders. Hans von Spakovsky writes at Fox why "Jeff Sessions is the perfect pick for attorney general," in part because of his commitment to federalism (although this may be federalism of a selective sort--not applicable to marijuana and sanctuary cities, for example--we'll see). Mark Hemingway defends the pick at The Weekly Standard.