Martial law may be declared by Congress or the President... Congress may declare martial law under Article I, Section 8, Clause 15, of the Constitution. Under this Constitutional provision, Congress has the power "to provide for calling forth the Militia to execute the Laws of the Union, suppress insurrections and repel Invasions."
The President's authority to establish Martial Law rests in his Constitutional powers as Commander In Chief of the US Military and the Militia under Article 2, Section 2. It also exists under Article 2, Section 3, as 'Chief Law Enforcement Officer" of the United States, the President is charged with the duty to TAKE CARE that the LAWS of the United States be faithfully executed. Martial Law may be required to perform these Constitutional duties. There exist precedent for the President to act unilaterally to declare Martial Law
Article 4, Section 4 of the US Constitution may also apply... to the President's Constitutional powers to establish Martial Law whenever the US Military is called into service to defend against invasion or DOMESTIC VIOLENCE. The Federal Government guarantees every State and its citizens the right to a Republican form of government... insurrection or domestic violence that threatens that guarantee may be met by the force of arms under command of the President and Martial Law.
Finally, the Supreme Court has ruled that both the President and Congress have the power to declare martial law... On the state level, a governor may declare martial law within her or his own state. The power to do so usually is granted in the state constitution. Congress has never declared martial law. The use of martial law in the past has always been initiated by the President or Governors.
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the use of federal troops has been rare. However, it has happened under several presidents, not just Abraham Lincoln, who had to use the military to stop a full-scale rebellion.
Both Presidents George H.W. and George W. Bush, respectively invoking the Insurrection Act of 1807, sent federal troops to respond to emergencies. President Dwight D. Eisenhower used the act to have federal troops enforce federal civil rights laws. Before that, Presidents Herbert Hoover and Woodrow Wilson used federal troops to respond to emergencies.
Two laws deal primarily with federal troops in domestic matters, according to the Congressional Research Service.
Under the Insurrection Act of 1807, Congress delegated authority to the president to call the military during an insurrection or civil disturbance. Under one provision of the law, a president can use the military to suppress an insurrection at the request of a state government in order to protect states against “domestic violence.”
After the passage of the 14th Amendment, another provision was added to the Insurrection Act that allows the president to use the military without the consent of a state government to suppress any “insurrection, domestic violence, unlawful combination, or conspiracy.”
TIme Mr. President to declare martial law... the situation in the nation will only deteriorate if the lawless conduct being permitted by some governors and mayors is permitted to continue... rollling riots, burning cities, murder, rape, looting, and the general lawlessness will be blamed on the Trump Administration by the Marxist MSM... we are experiencing the historical progression of an internal covert... going overt... Marxist revolution.