On December 18, 2019, the House of Representatives voted to impeach President Donald Trump on two articles: abuse of power and obstruction of Congress. The abuse of power charge centered on allegations that he pressured Ukraine to announce investigations that could benefit him politically while withholding military aid. The obstruction charge accused him of blocking witness testimony and document production. The vote fell largely along party lines. In early 2020, the Senate held a trial and acquitted him on both counts. The December impeachment vote underscored sharp partisan polarization and raised questions about the future role of impeachment in U.S. politics.