If Democrats sweep to power next week, as several pollsters predict, Facebook’s already lowly political fortunes are likely to take a sharp turn for the worse, Democratic congressional staffers and lobbyists say.

While the entire tech industry is fighting off demands by lawmakers for more regulation, Facebook is especially hard up for friends in Democratic circles, which could leave it on the outside as a possible Biden administration and Democratic Congress debate the future of the tech industry. Inside Facebook, some executives are bracing themselves for a tougher time if the political pendulum swings away from the Republicans, said a person familiar with the company's thinking.