A prominent critic of President Donald Trump sends what would appear to be a coded message: They subtly display four digits: an “86” followed by the two digits that denote Trump’s presidency.But the year is not 2025 with former FBI director James B. Comey; it’s 2020 with Michigan Gov. Gretchen Whitmer (D). While Comey on Thursday stoked controversy by posting a photo of seashells arranged in a formation of “86 47,” Whitmer engaged in a similar form of political protest five years ago. She appeared on television with a tiny “86 45” pin displayed on the table next to her.The...