WASHINGTON: President-elect Donald Trump has picked Republican Representative Mike Waltz to be his national security adviser, two sources familiar with the matter told Reuters on Monday, tapping a retired Army Green Beret who has been a leading critic of China. Waltz, a Trump loyalist who also served in the National Guard as a colonel, has criticized Chinese activity in the Asia-Pacific and has voiced the need for the United States to be ready for a potential conflict in the region. The national security adviser is a powerful role, which does not require Senate confirmation. Waltz will be responsible for briefing Trump on key national security issues and coordinating with different agencies. While slamming the Biden administration for a disastrous withdrawal from Afghanistan in 2021, Waltz has publicly praised Trump’s foreign policy views. “Disruptors are often not nice ... frankly our national security establishment and certainly a lot of people that are dug into bad old habits in the Pentagon need that disruption,” Waltz said during an event earlier this year. “Donald Trump is that disruptor,” he said. Waltz has a long history in Washington’s political circles. He was a defense policy director for defense secretaries Donald Rumsfeld and Robert Gates and was elected to Congress in 2018. He is the chairman of the House Armed Services subcommittee overseeing military logistics and also on the select committee on intelligence. Waltz is also on the Republican’s China Task Force and has argued the US military is not as prepared as it needs to be if there is conflict in the Indo-Pacific region. In a book published earlier this year titled “Hard Truths: Think and Lead Like a Green Beret,” Waltz laid out a five part strategy to preventing war with China, including arming Taiwan faster, re-assuring allies in the Pacific, and modernizing planes and ships. On Ukraine, Waltz has said his views have evolved. After Russia’s 2022 invasion of Ukraine, he called for the Biden administration to provide more weapons to Kyiv to help them push back Russian forces. But during an event last month, Waltz said there had to be a reassessment of the United States’ aims in Ukraine. “Is it in America’s interest, are we going to put in the time, the treasure, the resources that we need in the Pacific right now badly?” Waltz asked. Waltz has praised Trump for pushing NATO allies to spend more on defense, but unlike the president-elect has not suggested the United States pull out of the alliance. “Look we can be allies and friends and have tough conversations,” Waltz said last month.