The stock market is swooning. Consumers are stockpiling masks and antibacterial gels. President Trump’s response to a global epidemic has done little to quell fears.

In the right-wing media universe, however, the commotion over the coronavirus is hardly a crisis for the White House. Instead, it’s just another biased attack on a president from the usual haters.

“It looks like the coronavirus is being weaponized as yet another element to bring down Donald Trump,” Rush Limbaugh, the conservative radio host, said on his syndicated program this week, dismissing the disease as a Democratic talking point.

“The coronavirus is the common cold, folks,” Mr. Limbaugh added, incorrectly. (The coronavirus is more deadly and more contagious than the common cold, and it can cause severe flulike symptoms.)