Technically, the location which President Trump would choose to dump nuclear waste is inside/under Yucca Mountain in Nye County, about 90 miles from Las Vegas.
Ref: The Nevada Independent
A bit of history:
In 1954, "The Atomic Energy Act is passed by Congress directing the federal government to promote the peaceful use of atomic energy, with the understanding that disposal of the highly radioactive waste produced would be the responsibility of the federal government."
In 1982, "Congress passes the Nuclear Waste Policy Act of 1982 (NWPA) which establishes a repository site screening process, . . ."
[work on determining a site for disposal of nuclear waste proceeds, . . . until, . . .]
In 1987, "Congress amends the NWPA, designating Yucca Mountain, Nevada as the sole repository site, . . ."
[For those deficient in math skills, that's 33 years to decide where to deposit nuclear waste.]
Ref: Yucca Mountain
In 2017, malibber2, apparently noticing that there has been no progress in establishing an acceptable site for the disposal of nuclear waste over the ensuing 30 years, . . . states that newly elected President Trump wants to turn Las Vegas, Nevada into a nucear waste dump.
[For those deficient in math skills, that's
now a total of 63 years in which the Federal Government has been unable to complete the task put force by the Atomic Energy Act of 1954 to determine the site of a nuclear waste dump site, to construct a nuclear waste dump site, to deposit nuclear waste into a nuclear waste dump site.]
Present Nuclear Waste Dumps Within the United States:

The knowledgable reader, if any, may note that at present nuclear waste is "dumped" lots of places, . . . places near lakes and rivers, . . . places where there are severe weather events, . . . places where there are earthquakes, . . . places near oceans, . . . and generally over all sorts of underground geological formations.
Oh, and over those 63 years there have been lots of instances in which nuclear waste has "leaked" from its storage tanks, . . .most notably at The Hanford Nuclear Reservation in Washington State, . . . and as recently as 2016: Ref: Newsweek .
The Yucca Mountain site was selected because it was deemed the safest place within the United States to store nuclear waste.
DonDiego proposes that malibber2 communicate his recommendation to the Atomic Energy Commision of a solution better than the one-time proposed nuclear waste dump in Nevada. He is certain that the AEC will be grateful for the advice.