The Democratic Party has a long-term plan to undermine the Republican Party as bigoted and extreme, including promoting a Donald Trump candidacy.
According to leaked emails released by Wikileaks, the Clinton campaign saw the value in branding the opposing party as radical and bigoted in order to make the Democrats seem like the reasonable alternative. Part of that strategy included elevating more outspoken candidates like Donald Trump during the Republican primary in order to enforce that narrative.
In an email to campaign staff, Robby Mook, Hillary Clinton’s campaign manager, outlined the party’s greater strategy:
“I think we should just be clear about exactly what news we want to make. Personally, I think branding the GOP as bigoted and extreme is more in line with our bigger picture, long term goals, so I would favor sticking with asking why they didn’t speak out against what [sic] trump.”