The conservative personality Sean Hannity told viewers on Monday night to take the virus seriously and get vaccinated. Steve Doocy, the co-host of Mr. Trump’s favorite news program, “Fox & Friends,” had a similar message on Tuesday morning.
But the messages on Fox remain mixed, as do the Republican Party’s.
Senator Rand Paul, Republican of Kentucky and a doctor, is trying to change the subject. At Tuesday’s health committee hearing, he escalated his long-running attacks on Dr. Fauci over whether the National Institutes of Health funded “gain of function” research — experiments devised to identify genetic mutations that could make a virus more powerful — at a laboratory in Wuhan, China, where the pandemic began.
Mr. Paul accused Dr. Fauci of lying to Congress when he testified in May that the N.I.H. did not fund such work. Dr. Fauci shot back that he was not lying, and accused the senator of spreading falsehoods by implying American scientists were to blame for the pandemic.
Mr. Marshall used the hearing to raise questions about whether children should be vaccinated. He said afterward that he would encourage anybody over 50 to get the vaccine, but added that there were “pluses and minuses” for anyone younger than that, directly contradicting guidance from the C.D.C., which has said everyone over 12 should be vaccinated.
The senator added that those not yet vaccinated should get tested to see if they had antibodies from a previous infection, and if they did, they might not need a shot. That, too, goes against the C.D.C., which recommends vaccination for those who have recovered from Covid-19.