In Defying the Odds, we discuss leftward drift of the Democratic Party. The update -- recently published -- includes a chapter on the 2018 midterms.
At Brookings, Elaine Kamarck lists five issue positions that could blow up a D campaign in the fall:
1. Allowing prisoners to vote;
2. Ending all restrictions on abortion;
3. Abolishing private health insurance;
4. Abolishing ICE;
5. Embracing socialism.
She might also have added two more: