“The voters and their electors decide who is and who is not eligible.”
SCOTUS is “evading” any challenge the “political question” that has been decided by the voters and electors as you state. IMO, that doesn’t mean that a challenge could not in the future punch through the SCOTUS “evasion.”
For example, what if it is proved in federal court or in a House investigation that Barry engaged in a criminal conspiracy to hide a Kenyan birth and forge an HI BC and that state officials and jurists in HI as well as DNC officials including Nancy Pelosi all participated in the conspiracy, then impeachment or resignation would follow.
Voters and electors would have based their votes and election on false pretenses of an assumed US birth and federal courts could very well regard criminal penalties to be available against a sitting president up to removal from office for having never actually been eligible to serve.
Bill Clinton was deemed by federal courts as subject to civil litigation and remedies for civil torts against Paula Jones and only the statute of limitations prevented criminal charges from being brought against Clinton. Remember that Agnew was forced to resign due to crimes committed before taking office.
While only impeachment might be ultimately available to remove Barry if found guilty of criminally conspiring to hide a Kenyan birth, a conviction and imposition of numerous remedies short of removal would available and would inevitably provoke a resignation under threat of impeachment, IMO.
Impeachment and removal by court is just not what the Founders had in mind.