Which issues should Democrats FOCUS on the most?

[The Undefeatable Debbie Stabenow]

What I personally care about the most:

• criminal justice reform
• reform of campaign finance and the electoral process
• moving towards single-payer healthcare
• tax reform

What the Democrats would be the most successful focusing on when it comes to winning elections:

• raising the minimum wage (for such a widely-discussed and seemingly controversial topic last year, it's been surprisingly popular in several recent state referendums, and focusing on it conveys a care for working-class people)
• criminal justice reform (hasn't been touched on all that much in recent campaigns, but many proposals under this umbrella could easily be viewed as common sense proposals among much of the electorate, ex. abolishing private prisons)
• healthcare, but instead of focusing on getting single-payer, focus on the healthcare failures of the Trump administration and the Republican Congress (single-payer still isn't approved of a majority of Americans, and a leap that big so suddenly would be off-putting: Democrats should certainly move in this direction and should start making it a bigger part of their platform, but gradually, as single-payer gets more publicity as a concept)

Gun control measures and infrastructure are areas where Democratic policies are mostly popular among the public but neither seem to be political winners.