A man in Manhattan, Kan. has dropped his effort to get President Obama taken of his state's ballot, citing negative blowback.

"There's been a lot of animosity directed at people around me ... in ways that are intimidating," Joe Montgomery told the Manhattan Mercury. He told the Washington Post he was "really surprised" at the response, which went beyond him to include "personal and professional associates." He added, "It's become kind of a burden on other people to have to receive that kind of response."

Montgomery questioned the legitimacy of Obama's birth certificate, but he also argued that Obama was not eligible because his father was born in Kenya -- based on an 1875 Supreme Court case that some in the birther movement claim suggests a "natural-born citizen" must have two parents born in the U.S. An Obama campaign lawyer had responded to the objection with a letter, calling the claims "without merit."