Sens. John McCain and Tammy Baldwin on Monday called on President Trump to make good on his promise to lower drug prices, writing that the problem “is only getting worse.”

“We write to urge you to make good on your promise and make fixing the problem of high drug prices a top priority for you and your administration,” the senators wrote in a letter to Trump.

Trump’s administration has yet to take substantive action toward reducing the cost of prescription drugs after promising to do so several times last year and in his State of the Union address last month.

Read more at The Hill.