Reagan was being escorted to her seat and appeared to have lost her balance and fell, KNBC-TV, Los Angeles, reported Tuesday.
Sen. Marco Rubio, R-Fla., and others helped Reagan, 90, regain her balance and took her to her seat, witnesses said.
Reagan Library spokeswoman Melissa Giller told KNBC Reagan stayed at the event and wasn't injured. She said the former first lady apparently tripped on a post used for crowd control.
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