There has been bipartisan support for expelling Chappelle-Nadal from the state senate if she refuses to resign, but throwing someone out of the legislature is so rare that even those lawmakers who want to do so admit they are now researching the process to see if it is feasible. She also apologized to Missouri residents and her Statehouse colleagues. "And I'm not ever going to make a mistake like that again". I have learned my lesson.
Chappelle-Nadal has said she was among those hit by tear gas fired by police during the protests.
She took no questions following her brief comments to reporters.
Chappelle-Nadal, who joined the state Senate in 2010, said she made the post out of frustration stemming from the president's response to a deadly white nationalist rally in Charlottesville, Virginia, this month for which he said "both sides" were responsible.
Ms Chappelle-Nadal's post was in response to one that suggested Vice President Mike Pence would try to have Mr Trump removed from office.More news: Footage shows Sasikala entering jail in civilian clothes
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She told the St. Louis Dispatch that she doesn't actually want the president to be harmed. "And I failed them both recently", Chappelle-Nadal said.
The Missouri Constitution says a lawmaker can be expelled upon a two-thirds vote of the elected members of a chamber.
Gipson said the person who "ratted out" Chappelle-Nadal by screen-capturing her comment before it was quickly withdrawn actually exposed the message to a much wider audience than it would have had otherwise. In a speech laced with religious symbolism and references to being a "child of God", Chappelle-Nadal avoided making any mention of the actual content of the Facebook post that sparked the recent controversy. But that hasn't occurred in recent decades, and it's unclear exactly how it would happen.
Chappelle-Nadal told The Associated Press on Friday that she had met the previous day with the U.S. Secret Service as part of its investigation into her remarks about Trump.
During the Sunday press conference, she said she would continue to fight for issues that are really important.