Any nuclear weapon designed for use in a conventional war will only make nuclear war more likely. Furthermore, the environmental problems left by such a weapon should make that weapon unrealistic. And yet this George Jr administration has no problem with expanding the use of nuclear weapons even as bunker busting bombs - a bomb only for conventional warfare:
The Troubling Science of Bunker-Busting Nuclear Weapons
Forbid other nations from expanding the worldwide nuclear stockpile but at the same time make weapons that can more easily turn a conventional war into a nuclear one? A double standard. Either he opposes expanded use of nuclear weapons or he endorses it. Or he make decision only based only on a self serving agenda.
A president that fears use of nuclear weapons would not promote a nuclear bunker busting bomb.