From USA Today:

Paul Rosenzweig, a former senior counsel with Ken Starr’s independent counsel investigation of President Bill Clinton, said he would ask Yovanovitch about Ukraine’s rampant corruption, and whether she was ever asked to use American influence to advance anti-corruption activities.

Rosenzweig, now a senior fellow at the R Street Institute, said he would also ask what effect withholding military aid had on the ability of Ukraine to fight Russia.