The big media treated the anti-establishment rebellion of the '60s as something good. They will treat this attempt to overthrow the establishment as something bad, mainly because they are now the establishment. When Dylan sang, "The Times They Are A-Changin'," the pot-smoking, free love, anti-establishment hippies sang with him. If overcoming the establishment then was a great idea (it wasn't in view of what and who replaced it), overcoming today's establishment is a better one.
The establishment hates people it can't control and who are not beholden to those who run it. Conservative candidates who are scoring well understand this is a contest between the Washington establishment and the rest of the country. The establishment has one set of interests and the country has another. The conservatives are beholden to the people. The establishment is beholden only to itself and those it chooses to admit to the inside-the-beltway inner circle.
Conservatives can now sing Dylan's lyrics. This verse especially resonates:
"Come senators, congressmen please heed the call.
Don't stand in the doorway; don't block up the hall
For he that gets hurt will be he who has stalled
There's a battle outside and it is ragin'
It'll soon shake your windows and rattle your walls
For the times they are a-changin'.
To put it perhaps less elegantly: step aside establishment, or conservatives will step right over you.