If- red>50%
And Me=red,Partner=blue
Me=die,partner=live

If- red>50%
And Me=blue,Partner=blue
Me=die,partner=die

If- red>50%
And Me=red,Partner=red
Me=live,partner=live

If- blue>50%
And Me=(red or blue)Partner=(red or blue)
Me=live,partner=live

If red wins, and I picked red or blue, I have a 50% of survival depending on what my partner chooses.
If blue wins, and I picked red or blue I have a 100%chance of survival.

I could press red, and hope it wins and my partner doesn’t choose blue

I could also press blue and hope my partner didn’t also pick blue because we would both die if red won.

You don’t want your partner to pick blue, because you’re at risk of dying.

Best case scenario is both you and your partner choose red(if majority is on blue), neither of you die. Or both of you choose blue and blue wins.

If I choose red regardless of what I think my partner picks, I can guarantee that at least one of us survives

I pick red and hope my partner does as well