Mnuchin says he's not sure a 15% corporate tax rate is achievable

Treasury Secretary Steve Mnuchin said today that the White House is hoping tax reform can rally bipartisan support, but "if we can't get 60 votes we're prepared to use reconciliation to get it done... tax reform is Trump's number one priority."

At CNBC's Institutional Investor Delivering Alpha conference Tuesday morning Mnuchin also said he isn't sure the administration will be able to get the corporate tax rate down to 15%, as President Trump has vowed to do, given budget issues, but said they will get it lower. Meanwhile, he's "incredibly hopeful" they'll pass tax legislation by the end of the year.