Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE and South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegButtigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield Facebook takes down Chinese network targeting Philippines, Southeast Asia and the US MORE are the most-searched potential 2020 Democratic candidates, according to data released by Google.

Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) comes in third, according to Google, followed by former Rep. Beto O’Rourke (D-Texas) and Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.).

There are a lot of #Democratic Party candidates (and maybes). See the search horserace for 2019 so far.



LINK: https://t.co/yaz7Sm5f8g#dataviz pic.twitter.com/LOC8FL1HaG — GoogleTrends (@GoogleTrends) April 1, 2019

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Breaking down the search interest, Biden saw a 100 percent increase in the past week, while Buttigieg saw a spike of 35 percent and Sanders saw an increase of 18 percent.

Biden is widely expected to announce a 2020 presidential run, joining a field of more than a dozen Democratic candidates.

Several candidates saw interest spike concurrent with their campaign announcements, including Harris, who saw her peak around Jan. 21, when she made her announcement, and Sanders, who saw a similar peak when he announced on Feb. 19.