President Biden met with top cybersecurity advisers this week as the White House vowed to address mounting cyberattacks with Russian officials. Bloomberg reports Russian government hackers are behind a breach of a Republican National Committee contractor last week, though the source of the cyberattack has not been confirmed. The breach happened around the same time a massive global ransomware attack compromised hundreds of businesses and localities in the U.S. and around the world. Russia has denied responsibility for the hacks.