In the United States, the heads of top US spy agencies are to testify before Congress about possible links between Russia and President Donald Trump's election campaign. Federal Bureau of Investigation Director, James Comey, and National Security Agency chief Admiral Michael Rogers to appear today before the House of Representatives Intelligence Committee and give testimony on what ties President Donald Trump may have with Russia and his allegation that he was wiretapped by his predecessor Barack Obama.<br/><br/>In January, US intelligence agencies said they believed Kremlin-backed hackers had broken into the email accounts of senior Democrats and released embarrassing ones in order to help Mr Trump defeat Hillary Clinton.<br/>Moscow has denied involvement in the hacks, and Trump has denounced the tumult over alleged Russia connections as a total witch hunt.