“I have a problem with dual citizenship.”

That’s your perogative. Personally, I don’t think I could shirk off an entire half of my lineage, or not so easily as Obama shirked off his whiteness (according to his biography).

That’s your perogative. Personally, I don’t think I could shirk off an entire half of my lineage

That is why it is of utmost importance that the president has only a singe allegiance/citizenship. What would happen if a decision had to be made between the “other country” and the U.S.? Knowing there was allegiance to both countries would affect the decision being made. One might be hesitant to make a decision which could impact the other country negatively if there are still connections there and do harm to our country.

“I have a problem with dual citizenship.”
That’s your perogative. Personally, I don’t think I could shirk off an entire half of my lineage...

But see, this is NOT just about YOU shirking off part of your lineage -- it's about those who could damage our country if they are devious enough and have the financial backing to do so.

Consider THIS story from 2003, from an American Citizen who claims Dual Citizenship with Mexico:

U.S. Citizen in Mexico’s Congress

... Manuel de la Cruz, who was elected on a slate to the Congress’ lower house Sunday, is one of six Mexican expatriates who sought legislative seats from homes north of the border. Their goal, they say, is to give political clout to the millions of Mexican immigrants who send regular financial aid to their home states.

Now, what's to prevent a person like Cruz, with obvious "divided loyalties," to be financed by the Mexican Govt or Drug Cartels to run for President?

In Cruz's case, he was not BORN in the US (nor a "Natural Born Citizen"). However, THIS attempt (introduced by Barney Frank) at amending the Constitution in 2000 would have made it possible:

Constitutional Amendment To Allow Foreign-Born Citizens To Be President