Big business has ratcheted up its objections to proposals that would make it harder to vote, with several hundred companies and executives signing a new statement opposing “any discriminatory legislation.”

The letter, published Wednesday in The New York Times and The Washington Post, was signed by companies including Amazon, Google, Starbucks and Bank of America, and individuals such as Warren Buffett and Michael Bloomberg, plus law firms and nonprofit groups.

It was the largest group yet to join protests against Republican efforts to change election rules in states around the country.

“Voting is the lifeblood of our democracy and we call upon all Americans to join us in taking a nonpartisan stand for this most basic and fundamental right of all Americans,” the letter reads. “We all should feel a responsibility to defend the right to vote and oppose any discriminatory legislation or measures that restrict or prevent any eligible voter from having an equal and fair opportunity to cast a ballot.”

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