Start with national security, since the president’s most important duties are as commander-in-chief. Over the summer, Mr. Obama talked about invading Pakistan, a nation armed with nuclear weapons; meeting without preconditions with Mahmoud Ahmadinejad, who vows to destroy Israel and create another Holocaust; and Kim Jong II, who is murdering and starving his people, but emphasized that the nuclear option was off the table against terrorists — something no president has ever taken off the table since we created nuclear weapons in the 1940s. Even Democrats who have worked in national security condemned all of those remarks. Mr. Obama is a foreign-policy novice who would put our national security at risk.

Next, consider economic policy. For all its faults, our health care system is the strongest in the world. And free trade agreements, created by Bill Clinton as well as President Bush, have made more goods more affordable so that even people of modest means can live a life that no one imagined a generation ago. Yet Mr. Obama promises to raise taxes on “the rich.” How to fix Social Security? Raise taxes. How to fix Medicare? Raise taxes. Prescription drugs? Raise taxes. Free college? Raise taxes. Socialize medicine? Raise taxes. His solution to everything is to have government take it over. Big Brother on steroids, funded by your paycheck.

Finally, look at the social issues. Mr. Obama had the audacity to open a stadium rally by saying, “All praise and glory to God!” but says that Christian leaders speaking for life and marriage have “hijacked” — hijacked — Christianity. He is pro-partial birth abortion, and promises to appoint Supreme Court justices who will rule any restriction on it unconstitutional. He espouses the abortion views of Margaret Sanger, one of the early advocates of racial cleansing. His spiritual leaders endorse homosexual marriage, and he is moving in that direction. In Illinois, he refused to vote against a statewide ban — ban — on all handguns in the state. These are radical left, Hollywood, and San Francisco values, not Middle America values.

The real Mr. Obama is an easy target for the general election. Mrs. Clinton is a far tougher opponent. But Mr. Obama could win if people don’t start looking behind his veneer and flowery speeches. His vision of “bringing America together” means saying that those who disagree with his agenda for America are hijackers or warmongers. Uniting the country means adopting his liberal agenda and abandoning any conflicting beliefs.

But right now everyone is talking about how eloquent of a speaker he is and — yes — they’re talking about his race. Those should never be the factors on which we base our choice for president. Mr. Obama’s radical agenda sets him far outside the American mainstream, to the left of Mrs. Clinton.

It’s time to talk about the real Barack Obama. In an election of firsts, let’s first make sure we elect the person who is qualified to be our president in a nuclear age during a global civilizational war.