If there's one thing Republicans agree on, it's that they don't want Hillary Clinton anywhere near the oval office.<br />"Never Hillary" is prompting party constituents to unite behind GOP presidential nominee Donald Trump, whether they truly plan on endorsing him or not.<br />“Nothing unites Republicans better than a Clinton,” says Scott Reed, a political strategist for the U.S. Chamber of Commerce.<br />There are many unknowns in regards to Trump, but the "knowns about Clinton are very powerful motivators," Reed added.<br />One fine example: Former Republican candidate Marco Rubio, who once called Trump a dangerous "con artist," is now willing to help the latter in the general election.