Democrats now have easier paths to flipping the Senate. Here are races to watch.

Democrats’ chances of flipping the Senate have grown in recent months as President Donald Trump’s unpopularity, as well as frustration with the economy, push voters away from Republicans.

Democrats have been favored to seize control of the House, which has a narrow Republican majority. The math in the Senate is more daunting: Democrats control 47 seats to Republicans’ 53.