My bro's a lawyer and I just asked him via IM if any states allowed for the death penalty for attempted murder. He was careful to say some states may have statutes that he doesn't know about. (Typical CYA). He said the military does for sure, FWIW, but it has to have some aggravating factor (Rape, etc.).
Found this on a Texas Law School site. Attempted murder is not on the list.:
In Texas, the district courts have original jurisdiction for all criminal felony cases. If an individual is convicted of a capital felony, he or she may be subject to punishment by death, if the State sought such punishment. A capital felony is one in which an individual "intentionally or knowingly causes the death of an individual," under special circumstances. In particular, the:
murder of a public safety officer, firefighter, or correctional employee;
murder during the commission of specified felonies (kidnapping, burglary, robbery, aggravated rape, arson);
murder for remuneration; multiple murders;
murder during prison escape; murder of a correctional officer;
murder by a state prison inmate who is serving a life sentence for any of five offenses; [or]
murder of an individual under six years of age1.