WATCH: Shaheen blasts Rubio for ignoring Senate requests for information on Ukraine, Iran and more

Sen. Jeanne Shaheen, the ranking Democrat on the Foreign Relations Committee, lambasted Secretary of State Marco Rubio in her opening remarks during a hearing Tuesday.

Watch the clip in the video player above.

She said his office has refused to provide information requested about the Trump administration's changing troop posture in Europe as well as U.S. operations in Iran and American support for Ukraine.

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"When you do notify Congress, it's to inform us of decisions you have already made," she said.

She also focused on the U.S. military's declining stockpile of advanced weapons used in the Iran war.