Asma Khalid

Sen. Elizabeth Warren has built a reputation as the presidential candidate with a plan for almost anything. Plans are her brand, so much so that her campaign shop sells T-shirts proclaiming "Warren has a plan for that."

About three weeks ago, Vermont Sen. Bernie Sanders had a heart attack that threw his campaign into question. But now, it's more apparent than perhaps at any point in this presidential race that the 78-year-old white-haired politician and his revolution will remain a powerful force in the Democratic primary.

Former Vice President Joe Biden unveiled an ethics plan on Monday that directly targets President Trump, accusing him of creating the "most corrupt administration in modern history." It's a sign the Democratic presidential candidate is ramping up his defense ahead of the fourth Democratic debate in Ohio on Tuesday.

Jeromy Brown, a 46-year-old teacher in Iowa, considers President Trump a white supremacist.

"If the shoe fits, then say it, and the shoe fits him," Brown said, while waiting in a photo line at an Elizabeth Warren rally in August. "Why should he be excused from that label?"

More than 16 years after the U.S. invasion of Iraq, former Vice President Joe Biden is still struggling to explain his vote for the war and when his feelings about intervention evolved.

On Thursday night, during the third Democratic debate, which took place in Houston, Biden said he "never should have voted to give [President] Bush the authority to go in and do what he said he was going to do."

Massachusetts Sen. Elizabeth Warren introduced a sweeping gun control plan Saturday with the goal of reducing gun deaths by 80% through executive action and legislation.

"You've got to start with a goal. I haven't heard anybody else talk about a goal," Warren said in an interview with The NPR Politics Podcast. "What I've heard them talk about is here's one thing we'll do, and one thing we'll do, and one thing we'll do, and then we'll quit."

Before the first presidential debate last month, former Vice President Joe Biden's campaign signaled that he expected to be attacked by the candidates trailing him in the polls but that Biden would essentially ignore all incoming fire.

It was a classic front-runner approach. And it was punctured, hard and fast, by California Sen. Kamala Harris' attack on Biden's past opposition to federal busing policies.

Justin Krebs, a campaign director with MoveOn, isn't interested in hearing pundits debate which 2020 Democratic candidate is the most "electable."

"Because exactly four years ago right now there was a messy, crowded primary, with too many candidates, people who were totally unelectable, and Donald Trump was one of them and ended up winning," he pointed out.

And in the same vein, many Democrats thought Barack Obama was unelectable until he started winning primaries in 2008.

Progressive activists feel like this is their moment.

Their values are no longer seen as fringe ideas in the Democratic Party. Multiple presidential candidates are talking about "Medicare-for-all," reparations for slavery and bold action on climate change. And their ideas are driving the action on debate stages.

Now, as they gather in Philadelphia for the largest progressive convention of the year, Netroots Nation, they feel empowered as if this is their time to take over the party, push traditional Democrats aside and hold candidates accountable.

New Jersey Sen. Cory Booker, one of half a dozen Democratic senators running for the White House, is reintroducing a bill on Thursday that would fundamentally end the federal government's prohibition on marijuana.