(CNN) Utah Rep. Jason Chaffetz vowed Monday a more confrontational line as Speaker of the House, insisting that Republicans should be prepared to see a debt default and a government shutdown in order to pursue their party's agenda.

In a wide-ranging CNN interview, Chaffetz also signaled he wouldn't take the battle for Speaker to the House floor if he loses an internal party vote this Thursday, promised a more inclusive style of leadership and lambasted Republican leaders for being too quick "to cave."

And he demanded that the Obama administration name a special prosecutor to open up "a criminal probe" into allegations that the Secret Service leaked his personal information in an effort to intimate him.

"We don't know how far, wide and pervasive it was," he said of the Secret Service's snooping. "I feel violated."

The comments by the 48-year-old Chaffetz come as his sudden decision to run for the House's most powerful position has upended the battle to succeed the outgoing Speaker, Rep. John Boehner, R-Ohio. The current House majority leader, Kevin McCarthy of California, had been seen as a shoo-in for the spot.

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