President Joe Biden thinks his administration’s actions to reduce the price of prescription drugs represent some of his biggest achievements in office.He is about to call for doing even more.During Thursday night’s State of the Union address, Biden will propose strengthening the federal government’s ability to negotiate down the prices of drugs in Medicare, according to senior White House officials. He will also call for extending a $2,000 limit on out-of-pocket drug expenses, the officials said, so that it applies to all Americans with insurance and not just those in Medicare.Both…