Mr. Blanche, who can continue as acting attorney general indefinitely, cannot afford to lose a single Republican vote. He said he was mystified why Mr. Blanche had not sent him a clearly drafted commitment to “revising” the tax deal. “I can see why he wants it, because it provides immunity from audits no other taxpayer would get,” Mr. Cornyn added. During Mr. Blanche’s confirmation hearing this month, Mr. Cornyn joined Democrats in questioning Mr. Blanche’s independence from White House control and ultimately refused to commit to supporting his nomination. The post Vote on Blanche in Doubt After Senators Express Skepticism Over I.R.S.