The senator’s comments come at the end of a week in President Trump came under criticism — even from Republicans — for suggesting a delay in the November election over concerns of fraud in mail-in voting across the country.

U.S. Sen. Marco Rubio on dismissed worries about Florida mail-in voting in the 2020 elections.

"No I am not concerned about mail-in voting in Florida," Rubio said tersely. He did not elaborate.

The senator’s comments come after at the end of a week in which President Trump drew fire, even from GOP allies, for suggesting a delay in the U.S. presidential election out of fears about mail-in voting.

Among those who distanced themselves from the president was Gov. Ron DeSantis, who expressed complete confidence in Florida’s mail-in voting processes.

Rubio and Florida Lt. Gov. Jeanette Nuñez were on the call organized by the Trump-Pence campaign. The purpose of the call was to criticize reported consideration of California U.S. Rep. Karen Bass as Democratic presidential candidate Joe Biden’s vice presidential pick.

Both Rubio and Nuñez ripped Bass saying she has been an open sympathizer of the communist government in Cuba dating back to the 1970s. Rubio said Bass had shown, over decades, a "stunning amount of interest in the Cuban Revolution."

"It’s deeply troubling," he said.

Rubio said that while there has been an "evolution" in the debate over U.S.-Cuba policy, that is different than openly supporting or sympathizing with the Havana regime as the two Republican Florida leaders said of Bass.

"What exists in Cuba today is an evil, Marxist regime," Rubio said. If Bass ends up elected as vice president, Rubio said, "she will be the highest ranking Castro sympathizer in the United States government."

Nuñez said Biden’s consideration of Bass was a "slap in the face" to South Florida’s exile and refugee population, and it’s electorate.

Rubio and Nuñez spoke as yet another poll showed that Biden leads Trump in Florida by four percentage points, 50% to 46%. That poll, by Mason-Dixon, was released Thursday.