U.S. Ambassador to the United Nations Nikki Haley will have less freedom to make public remarks on foreign policy going forward, according to a new report.

Secretary of State Rex Tillerson wants Haley to run her remarks by State Department officials "if they are on a high-profile issue such as Syria, Iran, Israel- Palestine, or the D.P.R.K.," according to an email quoted in the New York Times. On other issues, she is to rely on the "building blocks" generated by State Department writers.

Haley took center stage as the face of Trump's diplomatic team early in the Trump administration, at a time when Tillerson seemed press-averse. In her first address to the UN Security Council, she announced that Trump would retain the economic sanctions that the Obama administration imposed on Russia following the invasion of Ukraine.

More recently, she drove much of the public debate over the U.S. strike retaliating against Syrian President Bashar Assad's use of chemical weapons.

"We need to put pressure on Russia, because Russia continues to cover for the Syria regime," Haley said Thursday. "Russia continues to allow them to keep humanitarian aid from the people that need it. Russia continues to cover for a leader who uses chemical weapons against his own people. Russia continues to veto and Assad continues to do these things because they know Russia will continue to cover for them."

The same week that Haley was leading the international debate over Syria, Tillerson displayed a low-profile tendency in response to news of a missile test by North Korea. "North Korea launched yet another intermediate range ballistic missile," he said in a three-sentence statement. "The United States has spoken enough about North Korea. We have no further comment."

Tillerson has played a more public role over the last month, however. The Syria strike took place days before he traveled to Moscow for high-profile meetings with Russian President Vladimir Putin and Foreign Minister Sergey Lavrov. On Friday, he chaired a meeting of the UN Security Council to lay out a series of steps by which the U.S. hopes to put more pressure on North Korea.

"Failing to act now on the most pressing security issue in the world may bring catastrophic consequences," Tillerson said, with Haley seated behind him.