Colorado's first gentleman Marlon Reis, who was diagnosed with the coronavirus last week with his partner Gov. Jared Polis, was hospitalized Sunday after his condition worsened, the governor's office said.

Reis experienced a "slightly worsening cough and shortness of breath," on his eighth day of the virus, according to the governor's office.

Polis drove Reis in his own vehicle to the hospital, according to the governor's office.

"Governor Polis is not experiencing any additional symptoms at this time," the governor's office said in a statement.

-ABC News' Clayton Sandell

The U.S. has hit another record level for coronavirus related hospitalizations, according to the COVID Tracking Project.

There are at least 101,487 Americans hospitalized as of Sunday evening, the tracking project tweeted.

There were over 176,000 new cases and 1,138 new deaths recorded Sunday, according to the health data.

The seven-day average for the tracking project's main metrics also saw new record highs. The seven-day average for new cases was 191,736, for deaths were 2,171 and hospitalizations were 99,939, according to the health data.

The U.S. has now reported over 100,000 cases every day for more than a month straight, and over 200,000 cases for the last three consecutive days, according to health data.

The country reported more than 1.3 million COVID-19 cases in the last week, which is more than any other week on record, the health data showed.

In the last month, the average number of daily cases has doubled. 

The U.S. is currently averaging over 186,793 new coronavirus cases every day, the highest the average has been since the beginning of the pandemic, according to health data.

Since last week, there have been nearly new 15,000 COVID-19 related deaths, with five days over the 2,000 mark, the health data showed.

That is roughly equivalent to 88 COVID-19 related deaths reported every hour. 

The U.S. is currently averaging 2,123 reported COVID-19 deaths a day, that average has increased by 142% since last month, according to the health data.

Hospitalizations continue to surge to unprecedented levels, with over 101,000 patients currently hospitalized with COVID-19 across the country, according to the health data.

Current hospitalizations have nearly doubled in the last month, the health data showed.

-ABC News' Arielle Mitropoulos

Los Angeles County set a new record number of coronavirus cases Sunday, the Health Department said.

The county saw 10,528 new cases and 23 new deaths, according to the Health Department. There are 2,855 people currently hospitalized, the Health Department said.

Los Angeles leads the country with total number of cases, 439,408, and total fatalities, 7,886, according to Johns Hopkins University's Coronavirus Resource Center.

Dr. Stephen Hahn, the commissioner of the U.S. Food and Drug Administration, was seen arriving at the White House on Tuesday morning ahead of his scheduled meeting with President Donald Trump's chief of staff, Mark Meadows.

It's unclear if Trump is participating in the meeting.

A source told ABC News that the meeting was called amid frustrations that the FDA hasn't moved faster in authorizing emergency use of a COVID-19 vaccine developed by U.S. pharmaceutical giant Pfizer and its German partner BioNTech.

Hahn issued a statement ahead of the meeting, defending his agency's timeline.

"Let me be clear -- our career scientists have to make the decision and they will take the time that’s needed to make the right call on this important decision," Hahn said. "We want to move quickly because this is a national emergency, but we will make sure that our scientists take the time they need to make an appropriate decision. It is our job to get this right and make the correct decision regarding vaccine safety and efficacy."

The FDA is already moving at an accelerated pace in going through data related to the vaccine candidate, but it's a process that takes weeks given the sheer volume and the stakes for getting it right.

"The amount of data submitted to the FDA includes thousands of pages of technical information that must be divided up and reviewed by experts from different disciplines. Once the reviews by the various experts are completed, they are then integrated into an overall review," a spokesperson for the agency told ABC News in a statement Tuesday. "Completion of these reviews involves such things as ensuring that the manufacturing process and the controls on manufacturing are appropriate, checking statistical analyses performed to ensure that they were done properly and doing additional analyses, as necessary, to look at the effect of the vaccine on subsets of individuals who might be at greater risk of adverse effects."

Meanwhile, an FDA spokesperson also confirmed to ABC News that Hahn had recently self-quarantined "out of an abundance of caution," following potential exposure at the agency's campus in White Oak, Maryland. He chose a remote location and continued working.

"Dr. Hahn has worked every single day of this pandemic, including weekends, holidays and more," the spokesperson said in a statement Tuesday.

ABC News' Katherine Faulders, Anne Flaherty and Jordyn Phelps contributed to this report.