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MOUNTAIN VIEW (KCBS) – Protesters will descend on Google headquarters in Mountain View on Thursday to demand that the company cancel its plans to sponsor the Republican National Convention.

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As Donald Trump comes to California to kick off his primary campaign here, demonstrators from eight activist groups will deliver almost half a million petition signatures to Google.

The petition tells the company it needs to pull out of the Republican National Convention, which Google typically sponsors along with the Democratic National Convention.

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“We’re trying to make clear that there is a cost this year to sponsoring a Trump-led convention,” Heidi Hess, senior campaign manager at Credo, told KCBS.

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Credo is part of the protest coalition along with the Courage Campaign and Color of Change.

A plane will pull a banner over Google, as well as the Golden Gate and Bay Bridges, that reads “Google: Don’t Be Evil, Dump Trump.”

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According to Hess, Coke is already scaling back its sponsorship plans, and Microsoft is the next target.

“Corporations are really feeling the pressure. And they are thinking twice about whether they want to attach their brand to the convention,” she said.

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Hess said sponsoring Trump equals sponsoring hate, racism and misogyny. Google has not responded to requests for comment.