US presidential hopefuls Sanders, Biden in tight race in early primary states

Democratic 2020 U.S. presidential candidates (L-R) former Vice President Joe Biden greeets Senator Bernie Sanders (I-VT) as they take the stage for the seventh Democratic 2020 presidential debate at Drake University in Des Moines, Iowa, U.S. [Reuters]

U.S. Senator Bernie Sanders and former Vice President Joe Biden appear locked in a tight race for the Democratic presidential nomination, as both campaigned in Iowa on Sunday with only days left until the first contest.

New polling released on Sunday showed Sanders leading in New Hampshire and tied with Biden in Iowa, the first two states to weigh in the Democratic primary. Gaining momentum at the right time has historically been key to helping a candidate secure the nomination.