Hundreds of American chief executives, companies, non-profits and billionaires on Wednesday signed a public declaration opposing legislation that would curtail voting rights in the United States.

Investment bank Goldman Sachs, tech giants Facebook, Amazon, Twitter and Google-parent Alphabet joined with wealthy individuals like Michael Bloomberg and Warren Buffett in adding their names to the statement issued after Georgia enacted strict voting legislation that critics say is aimed primarily at Black voters.

Lawmakers in dozens of states announced plans to take similar steps.

"For American democracy to work for any of us, we must ensure the right to vote for all of us," they said in the statement published as a two-page advertisement prominently displayed in The New York Times and The Washington Post.

"We all should feel a responsibility to defend the right to vote and to oppose any discriminatory legislation or measures that restrict or prevent any eligible voter from having an equal and fair opportunity to cast a ballot."

The country's largest private employer Walmart did not sign this declaration, but the company told AFP it stands behind a separate statement from the Business Roundtable trade group issued in March that endorsed voting rights and condemned "unnecessary restrictions."

The latest proclamation came after Georgia's Republican governor signed into law a measure imposing voter identification requirements, limiting the number of voting drop boxes and hours at polling places and forbidding volunteers from giving water bottles to voters who can be forced to wait in line for hours.

Demonstrators protest outside of the Georgia capitol building in opposition to legislation tightening voting restrictions on March 8, 2021 in Atlanta
Demonstrators protest outside of the Georgia capitol building in opposition to legislation tightening voting restrictions on March 8, 2021 in Atlanta GETTY IMAGES NORTH AMERICA / Megan Varner

The restrictions have been met with a mounting wave of public criticism and boycotts from corporations, sports and entertainment bodies.

Georgia was one of the most hotly contested states in the 2020 election, when President Joe Biden narrowly prevailed over Donald Trump, who claimed falsely that he lost Georgia due to voter fraud.

High turnout, especially by Black voters, was key to Biden's victory, and in runoff elections for two Georgia Senate seats which ultimately gave Democrats control of that chamber by the slimmest of margins.

Legislators in 43 states have introduced more than 250 bills that would make it harder to vote in response to the former president's "continued lies about voter fraud," according to the Brennan Center for Justice, a progressive think tank.

Michigan is among those states, and on Tuesday major companies based there, including automakers Ford and General Motors, released a letter saying "government must avoid actions that reduce participation in elections."

Georgia-based companies Coca-Cola and Delta Air Lines slammed the new law last month, while Major League Baseball decided to move its All-Star Game out of Atlanta after the law's passage. A major Hollywood movie production also pulled out of the state.

Republicans have responded with calls for a boycott of baseball as well as Delta.