Democrat Conor Lamb is the apparent winner of a House seat in Pennsylvania's Trump country by a razor-thin margin, an upset that gives Democrats a boost as they try to take control of Congress later this year. Pennsylvania's 18th is the type of district Democrats hope to win if they have a chance of winning control of the House in November. It has typically supported Republicans and is better educated, wealthier and better employed than the median congressional district. Democrats need to gain 24 seats in the midterms to take a majority in the House.