WASHINGTON - US President Donald Trump issued an executive order on Wednesday to revamp the foreign service to ensure "faithful and effective implementation" of his foreign policy agenda.

The order said failure to implement the president's agenda is against professional discipline and may lead to the termination of personnel.

The order came as Trump instituted changes to ensure US foreign policy is aligned with his "America First" agenda.

The executive order said US Secretary of State Marco Rubio will implement reforms in recruiting, performance, evaluation and retention standards to "ensure a workforce that is committed to faithful implementation of the President's foreign policy."

Also on Wednesday, US Senate confirmed former Hawaii Representative Tulsi Gabbard, who ran for president as a Democrat in 2020, as director of national intelligence.

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The upper chamber approved the nomination by vote of 52-48, largely along party line.

Senator Mitch McConnell, former Senate Republican leader, was the only Republican who maintained his opposition to Gabbard.

The Office of the Director of National Intelligence wields significant authority over how the intelligence community allocates its resources, conducts its collection and analysis, and manages the classification and declassification of the nation's most sensitive secrets, according to the statement.

Shortly after confirmation, Gabbard was sworn in as director of national intelligence in the White House Oval Office.