WATCH | President Trump calls Peggy Whitson aboard the ISS to congratulate her.
At this point, we'd forgive Peggy Whitson for being sick of space.
The NASA astronaut and current International Space Station commander broke the U.S. record for the most days spent in space on Monday with 535. Jeff Williams previously held the record at 534.
Whitson also holds the record for most spacewalks by a female astronaut and is the first woman to command the ISS twice. She'll be getting a congratulatory call from President Trump Monday morning, which NASA will be live-streaming.
So far, she doesn't seem sick of space.
When she's done, she'll have set a lofty record. She's not scheduled to return to Earth until September.
The Associated Press contributed to this report.
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