Hear Biden's response to Colonial Pipeline attack 02:36 (CNN)The White House said Monday there are no issues with fuel supply as officials worked urgently to ascertain the scope and fallout of a ransomware attack on the Colonial Pipeline, which supplies much of the eastern United States its gasoline -- an incident that laid bare vulnerabilities in the country's aging energy infrastructure. President Joe Biden and senior White House officials said the administration was working closely with Colonial Pipeline to mitigate the effects of the ransomware attack and subsequent shutdown of the pipeline. But both the President and officials leading the response repeatedly acknowledged their roles were limited because Colonial Pipeline is a private company, even though it controls the fuel supply to most of the East Coast.