I don't think the US Mints create coins honoring living Presidents.

"(b) United States currency has the inscription “In God We Trust” in a place the Secretary decides is appropriate. Only the portrait of a deceased individual may appear on United States currency and securities. The name of the individual shall be inscribed below the portrait." 31 U.S. Code §?5114(b).

LBJ signed an Executive Order for Kennedy half dollar, otherwise the standard is at least 10 years dead. Another exception was granted for some of those on the Presidential Dollars series.