The first major action by the Trump Administration for which I've done a search was the start of screening passengers arriving from China for signs of illness. This started January 17, at LAX, SFO, and Kennedy. Three days before that, on January 14th, WHO had announced to the world that China had found no evidence of human-human transmission of this virus.
Contrary to the current Dem/MSM narrative, Trump's Administration has done a lot, and in the context of what was known at the time, timely or even aggressively. When the "dust" settles some, maybe around July, 2020, I think we'll have/know the following:
* One or more effective treatments that have been released to public usage for Covid-19;
* One or more experimentally effective vaccines on target to be released before the end of 2020;
* Multiple layers of bureaucracy in China delayed their 12/31, "Geneva, we have a problem," announcement by 2-4 weeks;
* Multiple layers of bureaucracy in China delayed their 1/11 announcement to WHO of what the cause was and its DNA information by 2-3 weeks.
* China's shut down of travel out of Wuhan and other major cities in Hubei Province on January 23rd should have been done 4 or more weeks earlier.