Democratic presidential hopeful Cory Booker on Sunday delivered what he called the "hard truth" about Medicare-for-all: It will be difficult to pass, so the party should also ready more incremental changes.
His rival Sen. Kamala Harris the next day championed the Green New Deal, a sweeping climate proposal - before adding: "Some of it we'll achieve, some of it we won't."
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Then on Monday night, Sen. Amy Klobuchar told a young questioner at a CNN town hall that, unlike some of her fellow candidates, she would not support making four-year college free. "If I was a magic genie and could give that to everyone and we could afford it, I would," she said.
The increasingly large 2020 Democratic presidential field is fighting two simultaneous battles: a chaotic intraparty primary struggle over how far left to push their policies and a broader question of how to confront the challenge posed by President Donald Trump, who has already begun casting the Democrats as socialists.