Kamala Harris has sent $25,000 to the Democratic parties in four early nominating states (File Photo)

Democrat Kamala Harris, the first Indian-American to serve in the US Senate, said she will make a decision about a potential 2020 presidential bid during the upcoming holiday season.

"It will ultimately be a family decision," Ms Harris, who represents the state of California, told MSNBC during an event in San Francisco.

"And over the holiday, I will make that decision with my family."

Ms Harris, 54, was elected to the Senate in 2016.

She ranked fifth in a November poll of Democratic voters' preferred nominee to take on President Donald Trump's re-election bid, Politico news reported on Sunday.

Ms Harris has sent $25,000 to the Democratic parties in four early nominating states: Iowa, South Carolina, Nevada and New Hampshire.

In October, she visited Iowa, South Carolina and Wisconsin to campaign for Democratic candidates ahead of the midterm elections.