To the Editor:

Re “Sanders Is Victor in Michigan Upset; Trump Takes Three” (front page, March 9):

Donald Trump’s wins in Tuesday’s primaries and Bernie Sanders’s upset over Hillary Clinton in Michigan show that the policies that have supported middle-class prosperity in the past are no longer working. But Mr. Trump offers an old, backward-looking approach, and Mr. Sanders’s call for political revolution offers a forward-looking approach that will take more than rhetoric to achieve.

Barack Obama has been a good president, but he might have been a greater one if he hadn’t had to spend significant time on learning the job and how to deal with obstructionism. Our problems are urgent enough that we need someone in the White House who already knows the “ins and outs” and has reasonable proposals for action to steer the country toward middle-class expansion and well-being in this evolving global world.

ELIZABETH BJORKMAN

Lexington, Mass.

Note from KBJ: When I read letters like this, I wonder whether I inhabit the same universe as the letter writer.