A guide to how Democrats can take back the House in the midterms

Two years after President Donald Trump’s stunning upset win (despite receiving nearly three million fewer votes than his opponent), Democrats finally have a chance to regain control of one (or both) chambers of legislature. This would mean an opportunity for Congress to finally offer meaningful checks and balances on the Trump administration after the midterm elections, this Tuesday, Nov. 6.

Democrats need to flip 24 seats to win the House. Twenty-five GOP-controlled districts...