Conservative lawyer George Conway George Thomas ConwayGeorge and Kellyanne Conway honor Ginsburg Lincoln Project releases new ad blasting Trump as 'a horrible role model' George Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' MORE tweeted Friday that President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE should be sent to Walter Reed Medical Center and his Cabinet should declare him unfit to be president after Trump tweeted directions to American companies to find an "alternative" to doing business with China.

The husband of White House counselor Kellyanne Conway Kellyanne Elizabeth ConwaySpecial counsel investigating DeVos for potential Hatch Act violation: report George and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death MORE is a frequent critic of the president and has in the past claimed that the president is unfit for office, often advocating for Cabinet members to remove Trump per the 25th Amendment of the Constitution.

"I hereby order the White House staff to take @realDonaldTrump to Walter Reed, and to convene the cabinet under Section 4 of the Twenty-fifth Amendment," he wrote, adding the trending hashtag "Iherebyorder."

I hereby order the White House staff to take @realDonaldTrump to

Walter Reed, and to convene the cabinet under Section 4 of the Twenty-fifth Amendment.#Iherebyorder — George Conway (@gtconway3d) August 23, 2019

His remarks followed a string of tweets from the president vowing retaliation for tariffs on American goods announced Friday morning by China's State Council, adding that an official response to the tariffs would come Friday afternoon.

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"Our great American companies are hereby ordered to immediately start looking for an alternative to China, including bringing ... your companies HOME and making your products in the USA. I will be responding to China’s Tariffs this afternoon. This is a GREAT opportunity for the United States," he tweeted.

"Also, I am ordering all carriers, including Fed Ex, Amazon, UPS and the Post Office, to SEARCH FOR & REFUSE all deliveries of Fentanyl from China (or anywhere else!). Fentanyl kills 100,000 Americans a year. President Xi said this would stop - it didn’t," Trump added.

....your companies HOME and making your products in the USA. I will be responding to China’s Tariffs this afternoon. This is a GREAT opportunity for the United States. Also, I am ordering all carriers, including Fed Ex, Amazon, UPS and the Post Office, to SEARCH FOR & REFUSE,.... — Donald J. Trump (@realDonaldTrump) August 23, 2019

....all deliveries of Fentanyl from China (or anywhere else!). Fentanyl kills 100,000 Americans a year. President Xi said this would stop - it didn’t. Our Economy, because of our gains in the last 2 1/2 years, is MUCH larger than that of China. We will keep it that way! — Donald J. Trump (@realDonaldTrump) August 23, 2019

China announced Friday that it would implement tariffs on $75 billion worth of American goods in two waves, one in September and one in December. An additional tariff of 25 percent on U.S. automobiles, to go into effect in December, was also announced.

“In response to the measures by the US, China was forced to take countermeasures,” the State Council said. “The Chinese side hopes that the US will continue to follow the consensus of the Osaka meeting, return to the correct track of consultation and resolve differences, and work hard with China to end the goal of ending economic and trade frictions."