President Joe Biden on Tuesday signed into law a $430 billion bill that is seen as the biggest climate package in US history, designed to cut domestic greenhouse gas emissions as well as lower prescription drug prices and high inflation. At a White House event, Biden was joined by Democratic leaders including Senator Joe Manchin of West Virginia, whose support was crucial to passage of the Inflation Reduction Act along party lines, after he blockaded much larger measures pushed by the White House. "Joe, we never had a doubt," Biden said of Manchin. Biden later handed Manchin the pen he used to sign the legislation.