Asma Khalid

Joe Biden is a classic retail politician — a man who loves to shake hands, give hugs, take selfies and look voters directly in the eye, one-on-one. But now he can't do any of those things.

Instead, because of the coronavirus outbreak, his campaign is grounded: no rallies, no travel. It's all virtual fundraisers, live-streamed speeches, remote TV interviews, Facebook videos and volunteer Slack channels.

Updated at 10:37 p.m. ET

Joe Biden has run for president three times, and yet until Saturday, he had failed to ever win a primary or caucus.

The 77-year-old former vice president has now notched an expected yet much-needed victory in the South Carolina primary, according to The Associated Press's projection.

Cory Booker is a politician who sounds like a preacher.

"We may be down in a valley right now," he said during an Iowa campaign stop this week, "but I promise you, if you stand with me, if you caucus with me, if we stand for that spirit, I promise you, we will get to the mountaintop and we'll do it, because together as Americans, we know we will rise."

Michael Bloomberg, the billionaire former mayor of New York City, entered the Democratic presidential primary a month ago. He's already spent more than $100 million on advertising.

Bloomberg and Tom Steyer, another billionaire in the Democratic contest, have in total spent about $200 million so far, according to Advertising Analytics, a firm that tracks campaign ad expenditures.

When Elizabeth Warren arrived in Austin to teach law school at the University of Texas in the 1980s, colleagues say she was nothing close to the unapologetic progressive firebrand voters see today.

"She was quite consistently pro-business," said Calvin Johnson, who taught law school with Warren at the University of Texas. "And I'm sure she would not like to be called 'anti-consumer,' " he added. But, in his view, the future Massachusetts senator was "absolutely anti-consumer" on some positions at the time.

Updated at 3:25 p.m. ET

California Sen. Kamala Harris is dropping out of the presidential race, citing a lack of funds. She informed her campaign staff of the decision on a conference call and later sent an email to supporters, in which she wrote "my campaign for president simply doesn't have the financial resources we need to continue."

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."

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.

When bipartisan immigration discussions pop up, Democrats often insist it's hard to find a solution because of the GOP's immigration evolution. The days of Ronald Reagan endorsing an amnesty program and denouncing walls are long gone, replaced by President Trump's talk of "rapists" and quest for a wall.

In the spring of 2015, before Bernie Sanders had a campaign office in New Hampshire, Elizabeth Ropp, an acupuncturist, was making homemade signs for the Vermont senator.

"Bernie inspired me because as somebody who's lived without health insurance for most of my adult life, I want there to be a single-payer health care system," she said.

She was disappointed Sanders wasn't the nominee and is convinced that if he had been, Donald Trump would not be president.

"I want to see Bernie run again in 2020," said Ropp. "We need Bernie to run even if the field is crowded."