Neville,
I’m not sure what your suspicions are based on. Trump was clear in his message, which aligns with leading medical associations, to do away with DST and stay with Standard Time all year long so we don’t “lose” an hour in the summer.
To broaden your limited understanding, a simple Google search will reveal the 1966 Uniform Time Act, which prohibits year-round DST. However, year-round Standard Time is not illegal.
At this point, the federal government cannot expand DST to be all year, nor does it make sense for most states to do so.