What Issue has the most sway in determining how you vote?

[Blue3]

All of the positions on the issues I agree with are usually grouped together, so I've never really had to choose one or the other.

I vote from my worldview, I'm not a single-issue voter.

If we ever had a general election where 2 candidates were a different mix of traditionally half-Republican, half-Democratic candidates, (ex: candidate A wants to abolish social security and repeal gay marriage and end financial aid for college, but create single-payer healthcare and have criminal justice reform and end an unpopular war, and candidate B wants the opposite, and the other issues are similarly randomly divided between them), and listening to their debates carefully, would be the only way for me to figure it out.

[Blue3]

Should healthcare be combined with the social safety net option?

That would probably be the hardest for me to concede. The social safety net in general.