ACLU Rating:

Tom Tancredo has a 7% rating from the ACLU, the lowest of any 2008 presidential candidate.

Pros:
Drug War:
Opposed federal legislation written to prevent states from legalizing medical marijuana.
Gun Rights:
Holds a B+ rating from the NRA.

Cons:
Abortion and Birth Control:
Opposes Roe v. Wade.
Has received a 0% rating from NARAL Pro-Choice America.
First Amendment:

Supported a constitutional amendment banning flag desecration.

Immigrants' Rights:

Known primarily for his controversial views on immigration.
When a Colorado paper profiled a high school honor student whose family had immigrated from Mexico illegally, Tancredo personally attempted to have the teenager and his family deported.
Has condemned what he refers to as "the cult of multiculturalism," saying that "if we don't control immigration, legal and illegal, we ... will actually have to face the fact that we are no longer a nation at all."
Supports the forcible deportation of all undocumented immigrants.
Opposes citizenship track for undocumented immigrants.
Tends to oppose guest worker programs.
Supports revising the Constitution to revoke the citizenship of infants born in the United States to undocumented parents.
Lesbian and Gay Rights:

Supported the Federal Marriage Amendment.
Supported legislation that would have banned joint adoption by same-sex couples living in Washington, DC.
Race and Equal Opportunity:

Receives unwelcome praise from leaders in the white supremacist movement, who regard him as an ideal candidate.
Has close ties with several organizations that have been classified as hate groups by the Southern Poverty Law Center.
Refers to Miami, which is 66% Latino, as "a Third World country."
Was one of only 33 members of Congress to oppose renewal of the Voting Rights Act in 2006.
Has publicly called for the abolition of the Congressional Black Caucus, as well as Hispanic caucuses in both parties.
War on Terror:

Has called for nuclear strikes on Saudi Arabia in the event of another al-Qaeda attack. When asked about the likely civilian death toll, Tancredo responded: "When we bombed Hiroshima, when we bombed Dresden, we punished a lot of people who were not necessarily [guilty] ... You do things in war that are ugly."

Tom Head's Take:

Within a matter of minutes, I will start getting emails from angry Tancredo supporters who will tell me in forceful terms that this profile is unfair and inaccurate. I wish it were, but the truth is that you're looking at the scariest candidate in the 2008 race.