Oral arguments before the Ninth Circuit Court of Appeals raise the question of whether Donald Trump could sue to have President Obama removed from the ballot for the 2012 election:

Leaders in the so-called "birther" movement argued their case over President Barack Obama's U.S. citizenship before a federal appeals court Monday in Southern California, claiming the full birth certificate he released last week had been doctored.

[. . .] The appellate panel wonder[ed] how the lawsuit could have merit, given it was filed after the election and Obama had already taken office. "You did not file a claim at the time when the kind of relief you would be talking about might be plausible," Judge Raymond Fisher said. "It doesn't do anything for your candidates now."

[. . .] Assistant U.S. Attorney David DeJute acknowledged the courts may be the proper venue had a lawsuit challenging a candidate's citizenship been filed before an election. "I think a candidate can challenge the qualification of another candidate, assuming of course that candidate does so in a timely manner," DeJute said.

(Emphasis supplied.) It appears that if Donald Trump runs for President, he could file a "birther" suit against President Obama and seek his removal from the ballot. The ball is in The Donald's court (pun intended), no?

Speaking for me only