this is explored in greater detail in the dawkins film 'nice guys finish first'.

there's lots of examples in this primary, but klobuchar v warren is particularly clear. if they continue to compete, they're going to end up both getting <15% across the board. but, if they cooperate by picking a ticket and sticking with it, they could give bernie a run for his money.

buttigieg and biden is another example, but it's not as clear, yet.