Isabella Maria DeLuca arrested on misdemeanor charges in Irvine, California.
DeLuca, with 333,000 followers, worked for The Gold Institute for International Strategy.
Former intern for Republican congressmen Zeldin and Gosar.
DeLuca's online posts showed support for riot, citing grievances over election.
Denial of entering Capitol contradicted by FBI affidavit.
Over 1,300 charged in Capitol riot; over 800 sentenced so far.
DeLuca's employer severs ties following criminal charges.