Republican Presidents appear to love going back to the moon. In 1989, President George H.W. Bush announced a plan to go back to the moon and beyond. His son, George W Bush promised the same thing in 2004, setting a 2020 deadline to return to the moon.
Today, on the 45th anniversary of the last manned flight to the moon, Trump declared a return to the moon, and then, per the President, on to "Mars and, perhaps, someday, to many worlds beyond."
Republican Presidents have also consistently cut funding for NASA, the Government agency tasked with taking Americans to the moon and beyond, so it has remained a pipe dream for almost 30 years now.