FILE PHOTO: U.S. Democratic presidential candidate Sen. Elizabeth Warren holds a town hall event in West Des Moines, Iowa, U.S. November 25, 2019. REUTERS/Scott Morgan

(Reuters) - United States Senator Elizabeth Warren said on Wednesday that she still expects Larry Page to testify in Congress, a day after he stepped down as chief executive of Alphabet Inc GOOGL.O, Google's parent company.

“We do still expect you to testify before Congress,” she said in a tweet, while congratulating Page on “the move”.

She added that while Google co-founder Page’s title may have changed, he is still a part of Alphabet’s board of directors and retains “effective control”.

Sundar Pichai, who has been the chief executive officer of Alphabet’s Google for four years now, succeeded Page at the helm of Alphabet on Tuesday, making him the public face of a company long associated with its iconic founders.

Warren, vying for the Democratic nomination to take on President Donald Trump in November 2020, has vowed to break up Amazon.com Inc AMZN.O, Google and Facebook Inc FB.O if elected to promote competition in the technology sector.