He has no say. Chew on your facts some more
In June 2019 Delaware enacted early voting (HB 38), which goes into effect in 2022.
In March 2019 Virginia enacted in-person absentee voting (SB 1026), which goes into effect in 2020.
In January 2019 the New York legislature enacted early voting (SB 1102).
A 2018 ballot proposition approved by voters established in-person absentee voting in Michigan, and legislation (SB 1238) was subsequently enacted providing more details on implementation.
A 2013 law reducing early voting hours in North Carolina was struck down by the The Supreme Court in August 2016. Going forward early voting in North Carolina begins on the third Thursday and ends on the last Thursday before Election Day.
States control federal elections!
Check your reading comprehension. I never said states did not control Federal elections. I gave you two examples of where the Federal government has intervened, which is what Trump is planning to do in some form.