Psst. Judge Carter said the correct venue for this Quo Warranto was in DC.
Did he say that the President of the United States was subject to removal from office under the DC quo warranto statute? No. He just pointed out that, not being a judge for the United States District Court for the District of Columbia, he had no jurisdiction over a case brought under the District of Columbia Code.
Should she ever wander that far East, she will lose in DC too.