Amazon, BlackRock, Google, Warren Buffett and hundreds of other companies and executives signed on to a new statement released on Wednesday opposing “any discriminatory legislation” that would make it harder for people to vote. It was the biggest show of solidarity so far by the business community as companies around the country try to navigate the partisan uproar over Republican efforts to enact new election rules in almost every state. Senior Republicans, including former President Donald J. Trump and Senator Mitch McConnell, have called for companies to stay out of politics... “It should be clear that there is overwhelming support in corporate America for the principle of voting rights,” Mr. Chenault said. The statement does not address specific election legislation in states, among them Texas, Arizona and Michigan, and Mr. Chenault said there was no expectation for companies to oppose individual bills.