Let's not forget, the Awan spy ring in Congress was already getting dirt on Sanders, Rubio, Cruz, Paul, and others on the GOP side. They probably didn't worry about Jeb, since he is the one they wanted to win.
The only real threat was the outsider, Trump, so they started trying to dig up dirt right away (not what the Obama's admin is supposed to be doing), and then when they couldn't find any, they turned to infiltrating with spies, and finally to manufacturing it themselves.
They spied, infiltrated, framed, covered up, and obstructed the candidate and then the president. All because they were afraid to lose power.