Trump administration President Trump signs two executive orders related to immigration, one to take federal grant funding away from sanctuary cities, and another to build a wall along the U.S.–Mexico border.
United States President Donald Trump announces that he intends to seek an investigation into possible voter fraud from last year's election.
Vatican City State The Vatican City State announces that Pope Francis will name a Pontifical Delegate to head the Sovereign Military Order of Malta after Prince and Grand Master Matthew Festing's unexpected forced resignation in a spat over condoms.
Women's rights Belgium supports a plan by Dutch minister Lilianne Ploumen to launch a fund compensating worldwide for the United States' newly-reinstated Mexico City policy.
Domestic violence The Russian Duma backs a law decriminalizing a first instance of domestic violence that does "not seriously injure" the person, making it an administrative offense. The bill also includes violence against children.
Germany The German government decides it will abolish the crime of lèse-majesté, almost one year after the Böhmermann affair.
Foreign relations of Taiwan Burkina Faso and Swaziland refuse to break relations with Taiwan and recognize the One-China policy despite being offered aid from China.
2017 Mexico–United States diplomatic crisis Mexican senior officials say President Peña Nieto may cancel his plans to visit the White House next Tuesday, January 31, because of President Trump's actions.
Mexican President Enrique Peña Nieto rejects the idea, announced by U.S. President Donald Trump, that Mexico would pay for any border wall between the United States and his country.
Tahiti Over 800 homes are destroyed or flooded in Tahiti, French Polynesia, following severe storms over the weekend, with at least 4,000 people affected.
Somali Civil War (2009–present) Twenty-eight people are killed in a coordinated attack on the Dayah Hotel in central Mogadishu. The terrorist group Al-Shabaab claims responsibility.