The Maine primary is this Tuesday.

Why is it that Democrats are sticking with their deeply flawed, Nazi-tattoo-wearing Graham Platner?

Drip, drip, drip come the revelations, but Democrats are standing proudly behind the deeply troubled candidate.

On Tuesday, Senate Minority Leader Chuck Schumer was pressed by reporters about his backing of Platner after the latest batch of awful headlines about Platner’s increasingly chaotic campaign.

“I met with Graham Platner today. We will beat Susan Collins and take back the Senate.” Shumer went on to repeat that refrain four more times before ending the interview.

“Sunk costs” have crippled many a business and life decision, and they plague politics too. Sunk costs are expenses or investments that have already been incurred and cannot be recovered. Rational decisions focus on future costs and benefits, not past expenditures. Sunk costs can lead to emotional decisions in business and personal finances. And politics.

Both politically—and morally: Democrats are sinking in Maine.