Not since Walt Frazier have New Yorkers seen such exquisite basketball skills. Now Barack Obama has taken center court and his basketball skills are legendary in the recreation centers of Chicago. The buzz is that his head fake is deceptive and his jump shot deadly. He is apparently attempting to transfer his head-fake skills to the American political arena — fake right, go left. The American electorate should not fall for it.

Three revelations over the past month have started to reveal a very different portrait of the junior senator than what Mr. Obama and his promoters have been painting during this campaign. These recent revelations could redefine the campaign, and put him on unsustainable footing.

Mr. Obama’s candidacy was unanticipated. He came from obscurity in 2004, and was sworn in as senator in 2005. He started running for president in 2006.

With that lack of anticipation came a lack of vetting.

Mr. Obama advertises himself as a unifying figure who shares the hopes and values of the vast majority of Americans. But three separate occasions in the past month are at odds with his rhetoric of getting past party, race, and division, and bringing Americans together around ideas that can unite us.

Last week I explored Mr. Obama’s tax-raising and government-expanding agenda. While millions take issue with that agenda, millions more react strongly to his recently revealed social views. His remarks about abortion and gun rights are particularly troublesome.

If one looks at Mr. Obama’s recent unscripted comments in Pennsylvania and his answers on a 1996 candidate questionnaire, a coherent picture begins to emerge.

The first issue is abortion. Mr. Obama opposes restricting partial-birth abortion, which ends a late-term or even full-term unborn baby. More than 75% of Americans support banning that practice. Back in 1996, he wrote on the questionnaire that he opposes the legal rights of parents of a minor child to be informed of their daughter having an abortion unless the daughter is 13 years old or younger. This is not about parents giving their consent, just notification.

Mr. Obama also opposes state laws requiring the parents of a 14-year old who is about to undergo an abortion to be informed that their daughter is about to have a surgical procedure that could render her permanently infertile or involve other lifelong complications. More than 80% of Americans believe parents have a right to know.

Several days ago, Mr. Obama commented in unscripted remarks to a Pennsylvania audience that when his daughters become teenagers, he does not want them to be “punished with a baby” if they make a mistake.

Punished with a baby? Is that any way to refer to the miracle of life, even under unfortunate circumstances?

In that same 1996 questionnaire Mr. Obama revealed that he supports an absolute ban on Americans owning handguns. Almost 75% of Americans believe that the Second Amendment secures a right to private citizens to own and possess firearms, and therefore understand that banning handguns is unconstitutional.

Also last week, Mr. Obama said he opposes laws that would permit law-abiding citizens who pass a background check and complete any required classes from having concealed-carry permits. Most Americans favor concealed carry, especially if permit applicants go through a statutory licensing scheme. Opposing such laws is hardly mainstream.

Mr. Obama’s extreme views on the Second Amendment and abortions, coupled with giving benefits and driver’s licenses to illegal immigrants, and his opposition to surveillance of terrorist phone calls overseas, start to form a coherent portrait of a political radical with a pleasant smile and easy manner. The candidate who has said that evangelical leaders who speak out on issues like religious liberty and same-sex marriage have “hijacked” Christianity has provided us with an ample supply of social and national security issues to vet.

When we add his positions on economic issues to this picture, his naïve foreign policy and willingness as president to meet with tyrants without preconditions, we get a sharper portrait of Mr. Obama. It is a disturbing pattern.

Voters are being sold a bill of goods. The more we discover about him, the more he goes from looking like a big-government, doctrinaire liberal, to being a radical on the fringe of the political spectrum.

That leads to the second newsworthy aspect of these revelations: the complete disconnect between who this man is and who he claims to be.

Part of the presidential selection process we have in America is that candidates go through a long, arduous process to make their case to the American people. It includes more than giving speeches and releasing policy papers. It’s a conversation over a period of time.

Through this process — a process that normally takes several years — the American people take their full measure of a candidate.

Americans are now taking their measure of Mr. Obama and defending against the head fake.

Mr. Blackwell is a columnist for The New York Sun.