President Donald Trump continues to flirt with the prospect of serving until 2033, when he would be 86 years old. Whether he’ll follow through or not, his assertion that a third term is no joke is something that would-be-contenders ignore at their own peril.

Teasing a third term freezes the 2028 GOP presidential field until aspiring candidates have a clearer understanding of whether and how far Trump intends to push the limits of the Constitution.