Their ancestors migrated to North and South America thousands of years before European settlers came here so I'd say they were here first.
Quote from Wikipedia...""The 2021 findings of fossilized human footprints in relict lake sediments near White Sands National Park in present-day New Mexico suggest a human presence there dating back to the Last Glacial Maximum (LGM), between 18,000 and 26,000 years ago.""