They have reconciled themselves to a Romney candidacy because they see Romney as essentially a weak and passive president who will concede leadership to congressional conservatives:

All we have to do is replace Obama. ... We are not auditioning for fearless leader. We don't need a president to tell us in what direction to go. We know what direction to go. We want the Ryan budget. ... We just need a president to sign this stuff. We don't need someone to think it up or design it. The leadership now for the modern conservative movement for the next 20 years will be coming out of the House and the Senate.