"Horowitz oversees a nationwide workforce of more than 450 special agents, auditors, inspectors, attorneys, and support staff whose mission is to detect and deter waste, fraud, abuse, and misconduct in DOJ programs and personnel, and to promote economy and efficiency in Department operations."

-Huber and Horowitz can accomplish everything a SC can do.

-If Sessions feels that charges should have been made that weren't, he can still appoint a SC to make that happen.

-Huber is a lawyer from deep red Utah, not the D.C. swamp.

-“If a special counsel were appointed, there would be a great deal of delay,” Turley stated, versus the team of Huber and Horowitz, who are already five months into this investigation. (It's too late to even appoint a SC. Charges can be filed before midterms.)

-From /u/ClardicFug - Huber and Horowitz were both appointed to their positions by the Obama administration. This helps optics a lot. Pretty much decimates the "Trumped rigged the investigation" argument that's sure to be made.