It doesn't matter how large a font you use, Kamala Harris will face no serious challenge to her eligibility should she decide to run.
"Therefore every person born within the United States, its territories or districts, whether the parents are citizens or aliens, is a natural born citizen in the sense of the Constitution, and entitled to all the rights and privileges appertaining to that capacity." William Rawle, A View of the Constitution of the United States (1829).