Trump security adviser, Russian official already talking

President-elect Donald Trump's national security adviser and Russia's ambassador to the U.S. have been in frequent contact in recent weeks, including on the day the Obama administration hit Moscow with sanctions in retaliation for election-related hacking, a senior U.S. official says.After initially denying that Michael Flynn and Ambassador Sergey Kislyak spoke Dec. 29, a Trump official said late Friday that the transition team was aware of one call on the day President Barack Obama imposed sanc