Ted Cruz, the former Texas Solicitor General, has repeatedly said that he would "carpet bomb" ISIS into oblivion.
The major problem with that insanity is that carpet bombing is imprecise and would kill thousands of civilians because the battles that ISIS is fighting in both Syria and Iraq are over the control of various cities and urban areas within those two countries.
This is why, in 1977, the United States, and others agreeing to the modification of the Geneva Conventions, defined carpet bombing as a war crime.
Ted Cruz doubles down on vow to 'carpet-bomb' ISIS: http://www.businessinsider.com/ted-cruz-isis-carpet-bomb-strategy-2016-1
Carpet bombing of cities, towns, villages, or other areas containing a concentration of civilians is considered a war crime as of the 1977 Protocol I of the Geneva Conventions: https://en.wikipedia.org/wiki/Carpet_bombing