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S. 1039 (116th): Prevention of Unconstitutional War with Iran Act of 2019

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About the bill

Should Congress have a say in money spent to potentially attack or go to war with Iran, or should it solely be the president’s prerogative?


According to the Pentagon, Iran was responsible for an attack which set two oil tankers in the Gulf of Oman last week. Some fear this could lead to war. Acting Secretary of Defense Patrick Shanahan deployed 1,000 more troops to the region in response, and Secretary of State Mike Pompeo refused to rule out military action against Iran in an interview on CBS’s Face the Nation.

What the bill does

The Prevention of Unconstitutional War with Iran Act would disallow the Trump Administration from spending money which could lead to war with Iran without congressional authorization.

It was introduced in the …

Sponsor and status

Tom Udall

Sponsor. Senator for New Mexico. Democrat.

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Last Updated: Apr 4, 2019
Length: 5 pages
Apr 4, 2019
116th Congress (2019–2021)
Died in a previous Congress

This bill was introduced on April 4, 2019, in a previous session of Congress, but it did not receive a vote.

Although this bill was not enacted, its provisions could have become law by being included in another bill. It is common for legislative text to be introduced concurrently in multiple bills (called companion bills), re-introduced in subsequent sessions of Congress in new bills, or added to larger bills (sometimes called omnibus bills).


29 Cosponsors (27 Democrats, 1 Republican, 1 Independent)


Position statements

What legislators are saying

Udall Joins Legislation to Uphold Congressional Power of the Purse
    — Sen. Tom Udall [D-NM, 2009-2020] (Sponsor) on Jun 3, 2020

Udall Votes To Override President’s Veto of Bipartisan War Powers Resolution to Halt Trump’s Reckless Escalation with Iran
    — Sen. Tom Udall [D-NM, 2009-2020] (Sponsor) on May 7, 2020

VIDEO: Udall Hails Bipartisan Senate Vote to Halt March to War With Iran
    — Sen. Tom Udall [D-NM, 2009-2020] (Sponsor) on Feb 13, 2020

More statements at ProPublica Represent...


Apr 4, 2019

Bills and resolutions are referred to committees which debate the bill before possibly sending it on to the whole chamber.

S. 1039 (116th) was a bill in the United States Congress.

A bill must be passed by both the House and Senate in identical form and then be signed by the President to become law.

Bills numbers restart every two years. That means there are other bills with the number S. 1039. This is the one from the 116th Congress.

This bill was introduced in the 116th Congress, which met from Jan 3, 2019 to Jan 3, 2021. Legislation not passed by the end of a Congress is cleared from the books.

How to cite this information.

We recommend the following MLA-formatted citation when using the information you see here in academic work:

“S. 1039 — 116th Congress: Prevention of Unconstitutional War with Iran Act of 2019.” 2019. March 30, 2023 <>

Where is this information from?

GovTrack automatically collects legislative information from a variety of governmental and non-governmental sources. This page is sourced primarily from, the official portal of the United States Congress. is generally updated one day after events occur, and so legislative activity shown here may be one day behind. Data via the congress project.