We are live at the Mobile World Congress in Barcelona where A.I. is dominating the agenda. Deutsche Telekom CEO Tim Höttges tells CNBC that Europe is lagging in the digital world. Berkshire Hathaway posts a record 28 per cent jump in Q4 earnings bringing the company’s cash pile to $167bn but CEO Warren Buffett warns that a repeat performance in coming years is not guaranteed. Donald Trump comfortably defeats Nikki Haley in the GOP primary in her home state of South Carolina to cement his lead as the Republican presidential nominee frontrunner. Haley, however, has vowed to fight on. Russia’s invasion of Ukraine drags into a third year as a U.S. Congressional impasse continues to hold up military aid for the country.