Part of that ideological fight among the large Democratic field has seen some of Biden's rivals question Obama's legacy, as a means to criticize Biden who served as his vice president for eight years and who has embraced Obama's record.
Democratic Hamilton County Clerk of Courts Aftab Pureval (PYUR'-vawl), who attended the demonstration, referenced a moment at a Trump rally two weeks ago in North Carolina when the crowd chanted, "Send her back!" about a Somali-born congresswoman of color.
Republican Rep. Steve Chabot, who represents a Cincinnati-area district, said Wednesday he hopes the crowd will avoid such chants this time, and he thinks Trump will react more quickly if does happen.
A Central Kentucky man was arrested just seconds after a Donald Trump protester was punched multiple times outside of a rally in Cincinnati Thursday, and the confrontation was caught on video, according to media reports.
Last year, the Trump administration had implemented a "zero tolerance" policy to criminally prosecute border crossings, leading to the separation of hundreds of children from their families, who were detained by the authorities.
He criticized trade deals that he said have been bad for American workers - echoing US labor union beliefs, including even some Ohio Democrats - such as the North American Free Trade Agreement and the Trans-Pacific Partnership.
A reporter asked Trump if he was prepared to tell Thursday's crowd to stop if they started "chanting something problematic", and Trump gave a non-answer.
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Trent Alexander-Arnold will most likely start most games as the right-back after an impressive 2018/19 season. It's not as much important what I could say but what the boys showed today.
Trump took heat from both sides of the aisle last month after telling the "Squad" of four progressive congresswomen to "go back and help fix the totally broken and crime infested places from which they came".
Cincinnati's crowd offered their fair share of boos, cheers, 'USA, ' 'Build the wall, ' and even, at one point, returned to the 2016 campaign chant regarding Hillary Clinton - 'lock her up'.
"I think right now we're in that stage with Joe Biden where people are supporting him because there's that name recognition and because they feel like the party's going to inevitably pick him anyway, not because they are necessarily fired up about him or because they know his accomplishments", Phillips added.
All eyes will be watching both the OH crowd's behavior - and how Trump reacts.
"The Democrats have never been so far outside the mainstream", Trump claimed. However, he declined to specify which cities he was referring to, as a result of as he put it, "we want no controversy". I don't see anything bad about him.
President Donald Trump says he would "prefer" his supporters not engage in a "send her back" chant directed toward Rep. Ilhan Omar, but that if they do he'll still "love" them.
Seventy years ago, before Medicare existed to inspire "Medicare for All", a Democratic president wrestled with a challenge strikingly similar to what the party's White House hopefuls face today. I'd prefer that they don't.
And the crowd kept it more civil than the North Carolina audience. Bernie Sanders. There are alternate solutions more politically palatable to swing voters, he says. "And if his supporters began chanting it anyway, and he shut it down, I think he would appear strong and get some bipartisan praise".