Donald Trump's former primary opponent Sen. Marco Rubio is meeting with the Senate Foreign Relations Committee Wednesday as the president-elect's secretary of state nominee.

Rubio called China the "most potent, dangerous adversary" during his confirmation and is expected to work with India, Japan, and Australia to counter this.

China indicated that sanctions on US Secretary of State Marco Rubio wouldn’t impact official exchanges, in a sign that Beijing seeks to negotiate with the Trump administration over trade and other disputes.

Rubio -- long known as a Russia and China hawk in the Senate -- has been accused of dialing back his interventionist foreign policy approach to align with Trump's positions and may face fresh criticism from opponents who believe he might prioritize serving as a yes man to president over serving the country.

Secretary of State Marco Rubio is meeting with his counterparts from Australia, India and Japan as the Trump administration kicks off its formal foreign policy engagements in discussions with the Indo-Pacific “Quad.

Secretary of State Marco Rubio began his tenure as the top U.S. diplomat on Tuesday by pledging to keep his department at the heart of U.S. foreign policymaking and execute what he said was President Donald Trump's aim of promoting peace through strength.