WASHINGTON – A jubilant President Joe Biden announced a tentative deal Thursday to avoid a crippling strike by railroad unions following all-night talks as the clock ran down on threats to disrupt US supply chains in the run-up to midterm elections. “It feels good!” Biden told a tired-looking group of negotiators invited into the Oval Office after their sleepless night. “They should be home in bed,” he said. Biden, who was personally calling into the negotiations as late as 9:00 pm on Wednesday, issued a pre-dawn statement announcing the preliminary resolution, which allows for a 24 percent wa…