The pace of US COVID vaccinations has slowed down substantially, according to the latest data from the CDC. Average daily doses administered in the US have fallen to ~1.5 million in the last week, down from a peak of more than 3.1 million a day in mid-April.
The US slowdown is consistent with trends in the UK, Israel and other countries that were quick to roll out vaccines. With more than 275 million doses administered in total, that translates into roughly 50% of the US population that have had one dose (>60% of adults), and ~38% that have had two.
With a decent proportion (25-30% according to this study) of the US population reluctant to get a vaccine, it's likely that the rate of vaccinations will continue to drop, as the pool of willing people begins to thin out. That could mean the US tops out at 70-80% national vaccine coverage, probably with some quite extreme variability between states, cities and even neighbourhoods.