That’s from a Data for Progress poll taken after the death of Ruth Bader Ginsburg. This suggests that it will be possible to do it if the Democrats can make the case that Trump’s choice is a far-right extremist, which she is:
Democrats need to avoid hysteria and calmly start saving democracy. If they lose this one, which they will, they have to win big and then proceed to re-balance the system so that this nihilistic, power-mad, white nationalist minority cannot rule the country from the bench.