Trends during the past 14 years show that tourist arrivals from China have generally grown each year, except in 2005, 2012 and 2015, when arrivals dropped sharply.
Trump saying he could change the Constitution by executive order was opposed by Democrats, many legal scholars and a top Republican.
Trump said Tuesday if the WHO had acted appropriately, he could have instituted a travel ban on people coming from China sooner.
Trump is required to notify the committee no later than Sunday whether he will show up at the hearing, according to Nadler. "By that time, I ask that you also indicate who will act as your counsel for these proceedings," he wrote in the letter.
Trump's Twitter post appeared not only at odds with the Treasury Department, but with his own national security adviser, John Bolton, a hardliner who DPRK blamed for the breakdown of a second Trump-Kim summit in Hanoi last month.
Trump is spending the Easter holiday in Palm Beach, Florida, at his Mar-a-Lago resort. He told reporters on his way into Easter services that "Mexico has got to help us at the border".
北京胸闷做哪些检查
Trump greeted Kim and shook hands with him right above the military demarcation line (MDL), marked by a low concrete slab.
Tuesday also marked the 36th consecutive day that the U.S. daily cases had crossed the threshold of 100,000 since the beginning of November.
Trump has frequently called for more cuts in the federal funds rate, which has a target of 2-2.25 percent.
Trump said he had hoped to travel to Moscow to mark the anniversary.