Biden administration digs in on embattled Labor nominee Julie Su despite GOP opposition

Senate Republicans are demanding Biden withdraw Su's nomination due to concerns over her record.
Su will stay on as acting Labor Secretary indefinitely despite lack of Senate confirmation.
The administration believes there are no limits on Su's acting role since she was confirmed as deputy.
Republican lawmakers continue criticizing the decision to keep Su in acting capacity.
White House expresses unwavering support for Su despite stalled confirmation.