While GOP nominee Donald Trump took to the podium at the Republican National Convention in Cleveland, former Democratic candidate for president Sen. Bernie Sanders took to Twitter to bash Trump’s every word.

Sitting in what appeared to be a normal American living room, clad in a blue collared shirt, Sanders appeared to be tapping away on an iPad with Trump on the screen in front of him.

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He was just as disgusted by the statements as his supporters also were, and he let Twitter know about it:

We believe in bringing people together, not dividing them up. — Bernie Sanders (@BernieSanders) July 22, 2016

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Trump is wrong. The real cause of instability in the Middle East was the Bush-Cheney invasion of Iraq. By the way, where is President Bush? — Bernie Sanders (@BernieSanders) July 22, 2016

Trump’s big economic plans: Give trillions in tax breaks to millionaires, refuse to raise the federal minimum wage. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Trump’s economic plan: $3.2 trillion in tax breaks for millionaires, cut programs for low-income Americans. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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What a hypocrite! If Trump wants to "fix" trade he can start by making his products in the US, not low-wage countries abroad. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Fix trade. Stop manufacturing Trump shirts in Bangladesh at 30-cents an hour. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

Fix trade. Stop manufacturing Trump ties in China. — Bernie Sanders (@BernieSanders) July 22, 2016

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Fix trade. Stop manufacturing Trump clothing in Mexico. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

Citizens United is one of the worst decisions in our history. Will Trump mention it or is he too afraid of the Koch brothers? #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Still waiting for a single word about covering the 28 million Americans without health insurance. I guess they don’t matter much to Trump. — Bernie Sanders (@BernieSanders) July 22, 2016

Trump: “I alone can fix this.”

Is this guy running for president or dictator? #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

Looks like Ted Cruz was right about one thing. Trump does not understand what the Constitution is about. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Our movement understands that what we don't need is Trump's huge tax breaks for millionaires. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

Trump thinks climate change is a “hoax.” My supporters understand that we must move away from fossil fuels, not expand them. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Will there be one word about student debt or making college affordable? Or just concerned about more tax breaks for the rich? #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

Trump’s economic plan: same old, same old trickle-down economics. Pathetic. #RNCwithBernie — Bernie Sanders (@BernieSanders) July 22, 2016

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Trump’s economic plan: let states lower the federal minimum wage of $7.25 an hour, already a starvation wage. — Bernie Sanders (@BernieSanders) July 22, 2016

Trump’s Supreme Court nominees would, like Scalia, oppose a woman’s right to choose, support Citizens United and gut the Voting Rights Act. — Bernie Sanders (@BernieSanders) July 22, 2016

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An important message for Sanders’ supporters: