The United States this week will reunite four migrant families separated at the U.S.-Mexico border during the Trump administration, U.S. officials said, a small step toward fulfilling a campaign promise by President Joe Biden. #News #Reuters #Biden #Mexico #migrants Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en