Jonathan Karl, who is ABC News' White House correspondent, said Rubio's tweet was outrageous, wrong and hurtful.
There was no immediate response by the Florida Republican by social media or through a query to his Senate staff.
On Sunday, Rubio tweeted that “some in our media can't contain their glee and delight in reporting the the U.S. has more coronavirus cases” than China.
Beyond being grotesque, he suggested it was bad journalism because he believes the Chinese aren't telling the truth about how many of their citizens have contracted the virus.
“Who are you talking about, senator?” Karl asked during an appearance on ABC's “The View.” Rubio has not clarified which media members he believes were gleeful about the number of U.S. cases.
Karl said journalists at CBS and NBC News had died of COVID-19, the disease caused by the virus, and two members of the White House press corps are suspected of having contracted the virus.