In a significant development, the Supreme Court has rejected former top Trump aide Steve Bannon's final effort to avoid jail time for defying a subpoena issued by the House committee investigating the Jan. 6 Capitol riot. Bannon, aged 70, will now have to begin his four-month jail term on Monday.

The high court issued a one-sentence order, denying Bannon's "application for release pending appeal presented to The Chief Justice and by him referred to the Court." This decision comes after Bannon had asked the Supreme Court on June 21 to delay reporting to jail while he pursued an appeal against his sentence.

Bannon's conviction on two counts of contempt of Congress took place in federal court in Washington, D.C., in July 2022. The D.C. federal appeals court had previously upheld this conviction in May, rejecting Bannon's defense that he had not broken the law because his lawyer had advised him not to comply with the Jan. 6 committee's subpoena.

The former top advisor to then-President Donald Trump's fate was sealed by the Supreme Court's decision, and he must now prepare to serve his four-month jail term starting from Monday. It is important to note that Bannon's attorney has not yet responded to CNBC's request for comment on the court's order.

The House committee's investigation into the Jan. 6 Capitol riot is ongoing, as it seeks to uncover the events leading up to and during the attack on the U.S. Capitol. Bannon's defiance of the subpoena had drawn significant attention and raised legal questions regarding the scope of congressional authority.

As this story continues to develop, readers are encouraged to stay tuned for updates on Steve Bannon's incarceration and any subsequent developments regarding the Jan. 6 committee's investigation.