*Probably* losing my tenure-track position due to COVID-19 and low enrollment Due to low enrollment, my college's administration sent out letters rescinding all non-tenure full-year appointments (against our contract, too) and replacing them with a fall 2020 appointment only. This would be my tenured year if I made it through, and spring is unknown as of now.
I just interviewed with another institution that loves me (Zoom, informal), but I have not gone through with the official interview, and they hinted that they'd be willing to hold the position for spring for me. They are hiring urgently and my tenure is uncertain. I won't know until maybe November 2020 if I have a job next spring at my current institution.
I'll obviously need references, etc. from my current place of employment. My chair, several colleagues would gladly do it for me, but I'm afraid to tell them I'm about to leave... and I don't want to. But I have bills to pay and would hate a gap in employment and the loss of (potential) tenure, too.
What would you do?
What would you do?

Disclaimer: I have never been in this situation before, so I don't speak from experience. Following my advice would be risky; that said, so would any other course of action.
Act like a rat on a sinking ship.
Your university has unilaterally rescinded your contract. Go on the official interview. Ask your chair and colleagues to be references. Make every effort to find secure and permanent employment.
Tell your chair and dean that you love your university and would like to stay in the long term. (If this is true.) Bargain with them if possible, if you decide you trust them.
One option you may (or may not) have is to go on unpaid leave if you accept another job offer. Sometimes people accept a job at University B while going on unpaid leave at University A, go to B for a year, and then decide to return to University A.
If your chair and colleagues are worthy of your loyalty, then they could not expect it under these circumstances. Good luck.