Is Kerry eligible to serve as President?
Consider the following:
First, the Constitution provides as follows:
"No person shall be a Senator or Representative in Congress, or elector of President and Vice President, or hold any office, civil or military, under the United States, or under any state, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any state legislature, or as an executive or judicial officer of any state, to support the Constitution of the United States, shall have engaged in insurrection or rebellion aga inst the same, or given aid or comfort to the enemies thereof. But Congress may by a vote of two-thirds of each House, remove such disability."
(U.S. Constitution, Amendment XIV, Section 3)
http://www.law.cornell.edu/constitution/constitution.amendmentxiv.html
Second, certainly the presidency is "any office."
Third, it is equally certain that Kerry gave "aid and comfort to the enemy" on many occasions.
Kerry has consistently sided with the enemies of the United States. In 1970, during the Vietnam War, while still a naval officer, he secretly met with the enemy in Paris, returned and joined Jane Fonda's communist-front organization Vietnam Veterans Against War. He then became the leader of that organization, holding anti-American demonstrations in this country, mocking the American flag, encouraging our troops to disobey their commanders, assembling a group of phony "Vietnam Veterans" to testify falsely against their country and its troops, and then repeating "their" false charges before the Fulbright Committee in the US Senate. In all of this he was parroting the communist line throughout the world. North Vietnamese prison guards at the "Hanoi Hilton" used Kerry's accusations alternatively with torture to seek "confessions" from American POWs. The demands Kerry made of this country (withdrawal and reparations before return of POWs) were the same as that of Hanoi's delegation in the 1971 Paris talks. More than any other single person (with the possible exception of Jane Fonda), he caused America and the Free World to lose the Vietnam War. Vietnamese communist leaders have admitted that prior to observing the success of their Fifth Column in America, they had yet to win a military victory and were resigned to coming to terms with the US. Today pictures of Kerry and Fonda are on display in Vietnam museums as having been instrumental in America's defeat. It turns out that Kerry really was a "war hero" - to the enemy!
Similarly in Nicaragua, in 1985 when President Reagan was trying to remove the communist threat from our own hemisphere, Kerry intervened. The communist Sandinistas had taken over Nicaragua and their counterparts were conducting guerilla war in El Salvador. Opposing them were the patriots later dubbed the "Contras." Kerry went to Nicaragua to meet with the Sandinistas, worked out terms of peace favorable to the communists, and then returned to this country to plead the enemy's case before Congress and the American public. Fortunately, the Nicaraguan people took advantage of the promised elections to depose the Sandinista regime (which nevertheless attempted afterwards to hold on to some of their power). Kerry was thus unable (at least to date) to repeat his Vietnam "success."
Now in the War on Terror, Kerry once again has sided with the enemy. Even before receiving the nomination of the Democratic Party, Kerry's office sent an e-mail to the government-controlled news media of terrorist Iran, pointing out the benefits to the Iranian regime of his candidacy (i.e., of "regime change" in America) and seeking Iran's assistance in his campaign against President Bush. Kerry's overtures to Iran rewarded him with Iranian American fundraisers who sympathized with the ayatollah regime and opposed Iran's democratic student movement. In an unguarded moment, Kerry boasted of having the support of "foreign leaders," but subsequently refused to name them. They turned out to be, besides Iran, North Korea (Kim Jong Il), Al Jazeera (Al Qaeda's propaganda outlet), Castro's Cuba, Palestinian terrorist Yassir Arafat (who enlists Arab children to become suicide bombers against Israeli civilians), avowed anti-Semitic former Malaysian Prime Minister Mahathir Mohamed, and the leading symbol to date of terrorism's success, Jose Luis Rodriguez Zapatero, the newly elected Socialist Worker Party Prime Minister of Spain. Teresa Heinz Kerry has funded terrorist organizations such as Hamas and Hezbollah. Kerry has voiced support for the Iranian puppet Al Sadr in Iraq, despite the deaths of some American troops as his hands. In addition, Kerry's candidacy has been endorsed by the Communist Party of the United States.