President Donald Trump talks about drug prices during a visit to the Department of Health and Human Services in Washington in October. A federal judge on Monday blocked a major White House initiative on prescription drug costs, saying the Trump administration lacked the legal authority to require drugmakers to disclose their prices in TV ads.

President Donald Trump talks about drug prices during a visit to the Department of Health and Human Services in Washington in October. A federal judge on Monday blocked a major White House initiative on prescription drug costs, saying the Trump administration lacked the legal authority to require drugmakers to disclose their prices in TV ads.