"why would Republicans try to sabotage their own front-runner and risk a Democrat winning the White House?"
Because it doesn't matter which side wins,
as long as those who fund all the campaigns do
"The Republican establishment, elected officials and party leaders are in bed with the Democrats!"
“If Hillary wins, nothing is lost for them, it’s business as usual. The lobbyists keep their offices on K Street, the pharmaceutical companies keep paying them, the unions keep adding to their pensions and the lawmakers get their reelection bribes – I mean contributions – while we the underclass work two and three jobs and rack up a debt our children and grandchildren will have to pay for generations!”
“party elders are petrified of Trump,”
“The man is beholden to no one. He wins, and it’s game over for the elite.”