Citizen Journal

Emily Bazelon and David Newman at Slate sum things up:

Roberts has been floated as a nominee who could win widespread support in the Senate. Not so likely. He hasn't been on the bench long enough for his judicial opinions to provide much ammunition for liberal opposition groups. But his record as a lawyer for the Reagan and first Bush administrations and in private practice is down-the-line conservative on key contested fronts, including abortion, separation of church and state, and environmental protection.

Roberts is opposed by the following organizations:

Alliance for Justice:

As expressed in one case where he would have invalidated a provision of the Endangered Species Act, his exceedingly restrictive view of federal law-making authority – more restrictive than the current Supreme Court’s – could threaten a wide swath of workplace, civil rights, public safety and environmental protections. In his years of service as a political appointee in the administrations of Presidents Reagan and George H.W. Bush, Judge Roberts also helped craft legal policies that sought to weaken school desegregation efforts, the reproductive rights of women, environmental protections, church-state separation and the voting rights of African Americans.

Feminist Majority asks for "Emergency Donations" to "save Roe."

Leadership Conference on Civil Rights:

While D.C. Circuit Court Judge John Roberts's experience as a judge is limited, what little record he has on the bench raises grave concerns about his ideology and judicial philosophy, calling into question his elevation to the Supreme Court.

John Roberts is a D.C. Circuit Court judge who clerked for Supreme Court Justice William Rehnquist, worked in the Reagan and first Bush administrations, and went into private practice during the Clinton years. As Deputy Solicitor General, he co-authored a brief for the government in Rust v. Sullivan in which he argued that Roe was wrongly decided and should be overturned. He also co-authored an amicus brief in support of Operation Rescue and six individuals who had obstructed access to reproductive health care clinics.

As Deputy Solicitor General, Roberts filed an amicus curiae brief in NOW's case against Operation Rescue — in support of Operation Rescue, of course and in support of named individuals who routinely blocked access to clinics. At the Supreme Court level, that case was called Bray v. Alexandria Women's Health Clinic (it was NOW v. Operation Rescue at the trial and appellate levels). The brief argued that the protesters’ behavior did not discriminate against women and that blockades and clinic protests were protected speech under the First Amendment. The case helped us push congressional passage of the Freedom of Access to Clinic Entrances (FACE) Act.

Naral (they've already posted the following form letter, for people who can’t type and think at the same time:

As your constituent, I am urging you to oppose John Roberts, President Bush's nominee to the Supreme Court.

If Roberts is confirmed to a lifetime appointment, there is little doubt that he will work to overturn Roe v. Wade. As Deputy Solicitor General under the first President Bush, he argued to the Supreme Court that "Roe was wrongly decided and should be overruled....

(Belated h/t to Volokh for the link to the list.)