Can the President Override a Governor on the National Guard?

A president can override a governor and take control of a state’s National Guard, but only when specific statutory conditions are met, and as of 2025 federal courts will review whether those conditions actually exist before letting a federalization stand. The power is real and rooted in the Constitution’s militia clauses, yet three federal court decisions last year, capped by a Supreme Court order in December, made clear that a president’s say-so is no longer the final word.

The Two Statutes That Let a President Act Without Consent

When a president wants Guard troops out of a governor’s hands, the legal toolbox contains two main authorities. Both permit action over a governor’s objection. Both impose conditions.

The Call-Up Statute, 10 U.S.C. § 12406

This statute lets the president call Guard members into federal service, but only if one of three conditions exists: the United States has been invaded or faces danger of invasion, there is a rebellion or danger of rebellion, or the president cannot execute federal laws using regular military forces.¹ The statute adds a procedural requirement that became central to the 2025 litigation: orders federalizing Guard units “shall be issued through the governors of the States.”

The Insurrection Act, 10 U.S.C. §§ 251–255

The Insurrection Act, originally enacted in 1807, gives the president broader authority to use military force domestically. Section 251 lets the president call up the militia at a state’s request to suppress an insurrection against the state government. Section 252 goes further, letting the president act unilaterally when rebellion or obstruction makes it impossible to enforce federal law through normal court proceedings. Section 253 extends the authority to situations where domestic violence deprives a class of people of constitutional rights and state authorities are unable or unwilling to protect them.²³ Before deploying troops under the Insurrection Act, the president must issue a formal proclamation ordering those involved to disperse within a set time. Skipping that step can undermine the legal basis for the entire deployment.⁴

Once a governor’s Guard is federalized under either authority, the governor loses all command over those troops for the duration. They shift into the same chain of command and regulations as active-duty soldiers, answering only to the president.⁵

What Changed in 2025

For most of American history, the leading case on this question was Martin v. Mott, an 1827 Supreme Court decision holding that the authority to decide whether an emergency justifies calling up the militia “belongs exclusively to the President, and that his decision is conclusive upon all other persons.”⁶ The prevailing assumption was that a governor’s only recourse was political. Three cases in 2025 fractured that assumption.

California, June 2025

The Trump administration federalized California’s National Guard and deployed troops to Los Angeles. Governor Gavin Newsom sued, and U.S. District Judge Charles Breyer ruled the federalization illegal. None of the three conditions in 10 U.S.C. § 12406 had been met: there was no invasion, protests did not amount to “rebellion” in the statutory sense, and federal agencies including ICE had continued operating and so were not “unable” to execute federal law. Judge Breyer also found that the administration had failed to issue its orders “through” the governor as the statute requires. He ordered the Guard returned to state command and found the unlawful federalization violated the Tenth Amendment.⁷ By year’s end, the administration had abandoned the effort and the California National Guard was back under state control.⁸

Illinois, October 2025

The president called 300 members of the Illinois National Guard into federal service, citing the need to protect federal personnel and property in Chicago. Illinois and the City of Chicago sued. U.S. District Judge April Perry blocked the deployment, finding the administration had “overstepped its authority.” The Seventh Circuit largely upheld that ruling, and the administration asked the Supreme Court to intervene.

Trump v. Illinois at the Supreme Court, December 23, 2025

The Supreme Court rejected the government’s request in an unsigned order joined by seven justices. The Court held the administration had “failed to identify a source of authority that would allow the military to execute the laws in Illinois.” It said that “regular forces” in 10 U.S.C. § 12406 “likely” refers to the standing military rather than the National Guard, and that the statute “likely applies only where the military could legally execute the laws.”⁹ Justices Alito and Thomas dissented, arguing the president’s inherent constitutional authority to protect federal officers and property should suffice.

The rulings did not eliminate the president’s federalization power. They established that courts will review whether the statutory preconditions actually exist and will block deployments that fall short.

What a Governor Can Actually Do

A governor cannot physically withhold Guard troops once a valid federal order takes effect. Guard members who disobey a lawful federal order face prosecution under the Uniform Code of Military Justice. The mechanism for a governor’s resistance is the courthouse, not the armory. A governor who files suit promptly can obtain a court order blocking a federalization that lacks adequate legal basis, and the 2025 cases show that judges will examine the facts rather than defer to the president’s say-so.

A governor also retains the right to say no when the president merely requests Guard assistance under Title 32, where troops remain under state command and the federal government pays. Because Title 32 orders must be issued by the governor, the governor can refuse. In 2020, four governors declined the federal government’s request to send their Guard units to Washington, D.C., during civil unrest.¹⁰

One boundary matters here: governors cannot block overseas training deployments. In Perpich v. Department of Defense (1990), the Supreme Court upheld the Montgomery Amendment, which stripped governors of the power to withhold consent when Guard members are ordered to active federal training outside the United States. The Court held that Congress’s authority over the militia made the original gubernatorial veto a matter of legislative grace, not constitutional right.¹¹

The One Force a President Cannot Federalize

Roughly half the states maintain State Defense Forces, military units organized under state law that exist entirely outside the federal system. They cannot be federalized under any circumstances. They serve exclusively under the governor’s command and are typically used for homeland security, disaster response, and backfilling when Guard units deploy. For a governor concerned about losing military capacity to a federal call-up, a State Defense Force is the one asset the president cannot touch.

Where Things Stand

The president’s power to override a governor on the National Guard is intact where the statutory conditions apply, an invasion, a rebellion, or an actual inability to execute federal law through regular forces, and where the Insurrection Act’s procedural requirements are followed. What changed in 2025 is that the president no longer decides for himself whether those conditions exist. The Supreme Court signaled in Trump v. Illinois that a federalization has to rest on a source of authority the courts can identify. When it doesn’t, a governor who sues in time can get the Guard sent home.