BETHPAGE, N.Y. — Just two months ago, George Santos’ expulsion from the House looked like everything Democrats could have asked for. It gave them an open Republican seat in a winnable New York district, with an electorate still reeling from the congressman’s spectacular unraveling. The party even had a name-brand candidate, Tom Suozzi, who had won the seat easily three times before. But with less than a week to go before the Feb. 13 special House election, a wave of suburban discontent fueled by