Looking over https://en.wikipedia.org/wiki/List_of_U.S._presidential_camp... , there seem to be a few standard types:
1. A statement of some sort of policy goal ("Peace and Prosperity"; "Defeat the new deal and its reckless spending")
2. The candidate's name (incredibly common)
3. An achievement ("He kept us out of war"; "Four more years of the full dinner pail")
4. An attack on the other guy ("Roosevelt for ex-president"; "Are you better off than you were four years ago?")
5. Meaningless fluff ("Building a bridge to the twenty-first century"; "A time for greatness")
Some slogans can fit into multiple categories to varying degrees; "Roosevelt for ex-president" is a substance-free attack, while "Are you better off than you were four years ago?" is making a fairly identifiable complaint.
"Hope and change", obviously, goes in category five. But it's phrased as if it were in category one. The meaningless fluff is usually along the lines of "U-S-A! U-S-A!" (or "The candidate is great!"), which is hard to find offensive. I parse "hope and change" as something like an intentional bait-and-switch, except that it's a one-phase process ("we'll tell them something meaningless, but they'll think we have a plan!") instead of a two-phase process ("we'll tell them we have a plan, and then later we'll tell them we were never going to use that plan").
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Reclaiming Our Constitution and Our Liberties
As we combat terrorism, we must not sacrifice the American values we are fighting to protect. In recent years, we've seen an Administration put forward a false choice between the liberties we cherish and the security we demand. The Democratic Party rejects this dichotomy. We will restore our constitutional traditions, and recover our nation's founding commitment to liberty under law.
We support constitutional protections and judicial oversight on any surveillance program involving Americans. We will review the current Administration's warrantless wiretapping program. We reject illegal wiretapping of American citizens, wherever they live.
We reject the use of national security letters to spy on citizens who are not suspected of a crime. We reject the tracking of citizens who do nothing more than protest a misguided war. We reject torture. We reject sweeping claims of "inherent" presidential power. We will revisit the Patriot Act and overturn unconstitutional executive decisions issued during the past eight years. We will not use signing statements to nullify or undermine duly enacted law. And we will ensure that law-abiding Americans of any origin, including Arab-Americans and Muslim-Americans, do not become the scapegoats of national security fears.
We believe that our Constitution, our courts, our institutions, and our traditions work.
In its operations overseas, while claiming to spread freedom throughout the world, the current Administration has tragically helped give rise to a new generation of potential adversaries who threaten to make America less secure. We will provide our intelligence and law enforcement agencies with the tools to hunt down and take out terrorists without undermining our Constitution, our freedom, and our privacy.
To build a freer and safer world, we will lead in ways that reflect the decency and aspirations of the American people. We will not ship away prisoners in the dead of night to be tortured in far-off countries, or detain without trial or charge prisoners who can and should be brought to justice for their crimes, or maintain a network of secret prisons to jail people beyond the reach of the law. We will respect the time-honored principle of habeas corpus, the seven century-old right of individuals to challenge the terms of their own detention that was recently reaffirmed by our Supreme Court. We will close the detention camp in Guantanamo Bay, the location of so many of the worst constitutional abuses in recent years. With these necessary changes, the attention of the world will be directed where it belongs: on what terrorists have done to us, not on how we treat suspects.
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Our Constitution is not a nuisance. It is the foundation of our democracy. It makes freedom and self-governance possible, and helps to protect our security. The Democratic Party will restore our Constitution to its proper place in our government and return our Nation to our best traditions–including our commitment to government by law.