The United States vetoed a UN Security Council resolution seeking to reaffirm Jerusalem's status as unresolved, following U.S. President Donald Trump’s decision to recognize it as Israel’s capital.
All other of the 14 members of the Security Council voted in favor of the Egyptian-sponsored resolution. This was the first time the United States exercised its veto power at the UN Security Council since Trump took office.
Source: https://www.haaretz.com/israel-news/1.829759?v=EC20B7490E53FFFFF60199395D11F174