The District is struggling to attract new workers for the first time in 30 years after the Trump administration’s mass layoffs of federal workers, a new report shows. Yesim Sayin, executive director of the nonpartisan D.C. Policy Center, said the D.C. labor market hasn’t been this bleak since the city weathered the 1991-1992 recession and declared bankruptcy in 1996. The nonprofit think tank noted this month that the District shed more than 46,0…