The statement is strongly supported by the most recent evidence. A Politico article from two hours ago (Source 15) has a headline that directly matches the statement: 'IRS furloughs nearly half its workforce, shuttering most operations...' This is corroborated by other recent sources (Sources 10, 13) confirming that furloughs have begun after an initial delay. While an older source from eight days ago mentioned 'two-thirds' (Source 4), the most current reporting supports the 'nearly half' figure.