Rep. Matt Rosendale (R-MT) is expected to file articles of impeachment against Defense Secretary Lloyd Austin when the House returns from recess, accusing the Biden administration official of violating his oath of office after failing to inform the White House and even some members of his own staff of his hospitalization last week.

Rosendale plans to introduce the impeachment charges when lawmakers reconvene on Tuesday evening, citing several incidents in which the Montana Republican believes Austin failed to complete his duties since he took the position in 2021. The impeachment effort escalates the recent criticism Republicans have levied against Austin over the last week after he was hospitalized but did not disclose his condition until four days later.