Adam Kredo of the Washington Free Beacon documents an effort on Capitol Hill to block controversial U.S. payments to the Iranian government.

Congress is set to consider new legislation that would block the Obama administration from awarding Iran billions of U.S. taxpayer dollars in what many describe as a ransom payment, according to a copy of the legislation obtained by the Washington Free Beacon.

Sen. Marco Rubio (R., Fla.) will introduce … new legislation that would prohibit the Obama administration from moving forward with all payments to Iran, according to the bill, which would also force Iran to return billions of dollars in U.S. funds that have already been delivered to Tehran by the White House.

Rubio’s bill—a version of which is also being introduced in the House by Rep. Mike Pompeo (R., Kan.)—would mandate that Iran pay American victims of terrorism some $53 billion in reparations for past attacks planned and coordinated by the Islamic Republic.

The legislation comes amid a growing scandal surrounding the Obama administration’s decision to pay Iran $1.7 billion earlier this year as part of an effort to free imprisoned U.S. hostages. The payment, details of which were kept secret from Congress and the American people, is expected to become the focus of several congressional investigations in the coming weeks.

“President Obama’s disastrous nuclear deal with Iran was sweetened with an illicit ransom payment and billions of dollars for the world’s foremost state sponsor of terrorism,” Rubio said in a statement provided to the Free Beacon. “The U.S. government should not be in the business of negotiating with terrorists and paying ransom money in exchange for the release of American hostages. Doing so puts more Americans in danger, as President Obama himself admitted.”

The State Department recently reissued a travel warning for U.S. citizens traveling to Iran due to the possibility of kidnapping and imprisonment by the Iranian government.

Rubio said his new bill “would stop the Obama administration from making any further payments to Iran from the [Treasury Department’s] Judgment Fund until Iran returns the ransom money it received and pays the American victims of Iranian terrorism what they are owed.”