Conservative activists say a victory by Richard Mourdock in the Indiana Republican primary Tuesday would be a significant step toward a Tea Party takeover of the Senate GOP agenda.

Mourdock’s anticipated win over Sen. Dick Lugar (R-Ind.) would be a huge boost to the Tea Party movement, which earlier this year was said to be losing steam and viability.

Mourdock is one of a half-dozen Tea Party-allied candidates in Republican primaries who could change the balance of power among Senate Republicans.

Rep. Jeff Flake, who is favored to win the Arizona Senate Republican primary; Josh Mandel, the GOP nominee in Ohio; and Ted Cruz, who could be headed for a runoff election in Texas, are other conservatives who are in decent position to triumph in November.