This story is part of Watching Washington, a regular dispatch from CBC News correspondents reporting on U.S. politics and developments that affect Canadians.
News that Canada has surged past the U.S. in vaccinations for COVID-19 prompted a number of headlines in American and international news outlets, given how remote this scenario seemed months ago.
It's also prompted some finger-pointing within the U.S. One person making apparent his increasing frustration with developments in the U.S. is Anthony Fauci, director of the U.S. National Institute of Allergy and Infectious Diseases.
He was asked in a CNN interview what happened and why Canada had surpassed the U.S. in the rate of first and second doses despite the U.S.'s months-long head start.
Fauci blamed politics in the U.S.
"Canada is doing better not because we are trying any less than they are trying. It's because in Canada you don't have that divisiveness of people not wanting to get vaccinated, in many respects, on the basis of ideology and political persuasion," Fauci said in the interview Monday.
"I mean, political differences are totally understandable and a natural part of the process in any country. But when it comes to a public health issue, in which you're in the middle of a deadly pandemic and the common enemy is the virus, it just doesn't make any sense....
"That's a public health issue. That's not political. That's not ideological. It's a public health issue."
Then, on Tuesday, Fauci's frustration emerged during a U.S. Senate hearing. He expressed his annoyance with U.S. Sen. Rand Paul — a frequent critic of Fauci's throughout the pandemic.
WATCH | Fauci snaps in frustration with U.S. Sen. Rand Paul at a hearing Tuesday:
What's the context
Canada has roughly 70 per cent of its total population with at least one dose and more than 50 per cent fully vaccinated, with a slight difference between provinces. The U.S. rate is wildly uneven between states, with some boasting high vaccination rates and others very low ones.
As a result, the ratio of Americans with at least one dose is 15 percentage points lower than in Canada, and the ratio of fully vaccinated people is now about two percentage points lower in the U.S., according to the Our World In Data website run out of Oxford University.
Americans are increasingly worried that resistance to getting vaccinated is driving a case surge in pockets of the country.
Fauci said 99.5 per cent of all the deaths due to COVID-19 in the U.S. are now among unvaccinated people, with fully vaccinated people accounting for just 0.5 per cent.
But for over a year now, the conversation about COVID has been swamped in partisan politics, something Fauci has personal experience with.
In Florida, the state's Republican governor, touted as a possible 2024 presidential candidate, has been selling a "Don't Fauci My Florida" T-shirt, as he resists calls for vaccine passports and vaccination requirements. His state is now a COVID hotspot again.
Watch: Woman whose husband died of COVID-19 urges the vaccine-hesitant to get shots:
Meanwhile, right-wing news outlets regularly feature guests who question vaccine effectiveness or who criticize various public vaccination efforts as heavy-handed.
In a separate interview, Fauci said polio would still exist if the country had dealt with past vaccines this way.
Some personalities on Fox News pleaded this week for viewers to get vaccinated.
Now Canada is, indeed, relaxing those restrictions, with further easing on Aug. 9. And it's unclear when the U.S. might do the same for land travellers. The U.S. never stopped cross-border air travel.
The White House was non-committal when asked Monday whether it will follow Canada's move when the latest monthly travel rule lapses in the middle of this week.
"Any decisions about reopening travel will be guided by our public health and medical experts," White House spokesperson Jen Psaki said.
"We take this incredibly seriously. But we ... are guided by our own medical experts. I wouldn't look at it through a reciprocal intention."