They have to be a quality politician, for sure, but they must also have some luck on their side.
Because Warren didn't cross the 15 percent threshold required to be awarded delegates, she came away with zero from New Hampshire.
Sen. Bernie Sanders is arguably the front-runner for the Democratic nomination following his New Hampshire victory, but his struggle to gain support among female voters may be a good sign for President Trump, according to conservative commentator Ben Shapiro.
"What happened to Middle Class Joe?" asked anchor Hallie Jackson, referring to Biden's claim that he would appeal to working families who would find him relatable.
With two poor showings in the nation's first caucus and primary, hope may be dwindling in the Biden camp, and perhaps rightfully so.
In 1992, Bill Clinton came closest to accomplishing this feat.
Senator Elizabeth Warren performed poorly throughout New Hampshire on Tuesday, but the performance was especially pronounced in towns that border or are close to bordering MA, where, in theory, Warren should have widespread name recognition. But in Iowa he had at least earned the minimum votes needed to secure the delegates who will determine the party's nominee against President Donald Trump. Despite winning the popular vote for the second straight week, Sen. McGovern would eventually win the Democratic presidential nomination but lose to Richard Nixon in the presidency. In Iowa, Biden captured only a single county that did so but only by a mere two points.
Current caucus results show Buttigieg with a narrow lead over Sanders in the state delegate equivalent count, the traditional metric by which a victor is declared in Iowa.
Biden rallied black supporters in South Carolina Tuesday evening.
Despite grim prospects, which have taken a "severe downturn" in Larry Sabato's eyes, a political scientist and professor of politics at the University of Virginia.
A New Hampshire voter told an MSNBC reporter Tuesday that the cable network's anti-Bernie Sanders coverage got her "angry" and inspired her to cast a primary ballot for him.
"I am a numbers guy", he said.
Both have vowed to stay in the race and believe they will be more competitive in future states such as Nevada and SC.
"If you don't like what's going on in this country, you only have one thing to do - work", Biden says.
Now as the contest moves to Nevada and SC in the run-up to Super Tuesday looming large on March 3, Biden must reassure voters he is the best person for the Democratic Party to pit against Trump this fall without much evidence to the contrary.