All living ex-U.S. presidents, except Trump, appear in ad touting COVID-19 vaccine

WASHINGTON – Former President Barack Obama is looking forward to visiting his mother-in-law on her birthday.

Former President George W. Bush can't wait to attend an opening day for the Texas Rangers with a full stadium.

"Roll up your sleeve and do your part," Bush says in a public service announcement urging people to get the COVID-19 vaccine.

The ad also features fellow former presidents Bill Clinton and Jimmy Carter and includes photos of all four – along with their wives – getting vaccinated.

"Four presidents. Two political parties. One clear message: Get vaccinated when it’s available to you," the White House tweeted when promoting the ad Monday.

Missing from the announcement is former President Donald Trump, who did not receive his vaccination in public. 

President-elect Joe Biden receives his second Pfizer vaccination on Jan. 11, 2021, in Wilmington, Del.

On Sunday, Dr. Anthony Fauci said it "would make all the difference in the world" if Trump would participate in a vaccination campaign aimed at his followers. 

"He's such a strongly popular person. I cannot imagine that if he comes out that they would not get vaccinated," Fauci said on "Fox News Sunday." "It would be very helpful to the effort for that to happen."

A recent PBS NewsHour/NPR/Marist poll found that Republican men and Trump supporters remain thetop groups against getting a vaccine.

That poll surprised Fauci, who is President Joe Biden's top medical adviser. 

"I don't understand where that's coming from. This is not a political issue. This is a public health issue," Fauci said. "I just don't get it."

During Biden's first prime time address last week, he urged people to trust Fauci, who has assured the public that the vaccines are safe and effective. 

"That's why we got the vaccine publicly in front of cameras for the world to see so you could see us do it," Biden said of his own vaccination and that of Vice President Kamala Harris.

More:People with immune issues – at 'high risk' for COVID-19 – remain hesitant about vaccination. Here's what experts say

More:Why you don't want to post a selfie with your COVID vaccine card