President Joe Biden is probably smiling on Wednesday after one of his few challengers for the 2024 Democratic nomination reportedly dropped out of the race. Self-help and spirituality author Marianne Williamson, who has been challenging Biden for the Democratic presidential nomination, on Thursday reportedly notified her supporters that she was dropping out of the race. Williamson, who denied similar reports after they surfaced last week, was polling in the single digits in the primaries against the president. ALSO READ: Alina Habba is persona non grata at her Pennsylvania law school Among the…