Liberal Elizabeth Warren has launched a sharp attack on Republican Donald Trump in her first campaign appearance with Democratic presidential candidate Hillary Clinton, calling him an "insecure money grubber" who is driven by greed and hate.
Warren, a leader of the party's progressive wing and a potential vice presidential pick, said on Monday Clinton has spent her career fighting for liberal values while wealthy real estate developer Trump is focused on bolstering his bottom line.
The populist senator from Massachusetts appeared with Clinton before a rowdy, enthusiastic crowd in Cincinnati, targeting a battleground state in a potential preview of a Clinton-Warren campaign team.
"When Donald says he'll make America great, he means greater for rich guys just like Donald Trump," Warren said, standing with a cheering Clinton.
Clinton has struggled to win over some liberal backers of rival Bernie Sanders since beating him for the Democratic nomination earlier this month.
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The capacity crowd repeatedly roared its approval, and a line of supporters who could not get inside stretched out the door and down the street.
In a statement, Trump called Warren "a sellout" for backing Clinton, who has taken donations from Wall Street interests and once backed the Trans-Pacific Partnership, the Asian trade deal.
Clinton has since reversed her trade stance.
"As Clinton tries to salvage support among the Bernie Sanders wing of the Democrat Party, Senator Elizabeth Warren has become a turncoat for the causes she supposedly supports," the Trump campaign said in a statement.
Once she took the microphone in Ohio, Clinton made it clear she liked Warren's aggressive approach to her Republican rival, who has sprayed rivals and critics with insults throughout his campaign.
Warren's rhetoric about breaking up too-big-to-fail banks and reining in corporate excess could resonate with two groups Clinton must court in the election - Sanders supporters and those anxious about the economy who are drawn to Trump's promise to toss out international trade deals.
Ohio's manufacturing base has taken a hit in recent economic slowdowns, and Trump has identified it as a state where his anti-free trade rhetoric could resonate with alienated blue-collar voters.
In recent days, Clinton's campaign has accused Trump of caring more about how Britain's referendum to leave the European Union would benefit him financially than how it would impact the US economy.
Trump's campaign said the historic vote showed Trump was in sync with a global sentiment of economic frustration and Clinton was out of step.
