Why did Democratic pride in being American collapse from 2001 to 2026?

Polling data shows that in January of 2001, 90% of Republicans were proud to be American.
That same poll shows the same 90% of Republicans were proud to be American in January, 2026.
That same poll shows that 85% of Democrats were proud to be American in January, 2001, while only 29% of Democrats were proud to be American in January, 2026.
What happened?

Why did Democratic pride in being American collapse from 2001 to 2026?
Post Opinion