Congress is taking a close look at an unprecedented Bush administration plan to share nuclear technology with India, with daylong testimony by Secretary of State Condoleezza Rice likely to provoke a skeptical reaction from lawmakers.

In testimony Wednesday to the Senate Foreign Relations Committee and the House International Relations Committee, Rice is defending the deal President Bush reached last month with India. The pact strengthens U.S. ties with the world's largest democracy but also upends more than three decades of U.S. law and policy.

Her appearance comes at a time of growing domestic disenchantment with U.S. foreign policy. Uncertainty over the military course of a rising China, unceasing turmoil in Iraq and stalemated Mideast and nuclear diplomacy over Iran and North Korea pose difficulties for Rice, even though her own performance continues to receive rave reviews on Capitol Hill.

The election season is dawning for members of Congress and those who aspire to replace them. They all are aware of public discontent with the Bush administration's global record on several fronts.

The new U.S. strategic partnership between Washington and New Delhi reverses restrictions on trade with states, such as India, that did not accept comprehensive international safeguards over all their nuclear facilities. The administration's response is that the deal will foster nonproliferation by conditioning India's purchase of foreign-made nuclear reactors on opening its civilian facilities to international inspections.

However, the Congressional Research Service, in a report last week, noted that India would have the sole right to decide which reactors are civilian and which are military, which need not be under international supervision.

Undersecretary of State Nicholas Burns, who played a pivotal role in negotiating the agreement, has offered assurances that "India can be trusted."

But Sen. Barbara Boxer, D-Calif., a member of the Foreign Relations Committee, is critical of the agreement.

"I do not share the view that closer U.S.-India ties will be a counterweight to China, which seems to be the unstated yet driving force behind this deal," Boxer said in remarks prepared for delivery at the hearing. "This type of thinking is not only outdated and dangerous, it flies in the face of reality."

Boxer said India's recent record indicates that it has no interest in being a "hedge" against China. "It is naive to think otherwise," Boxer said.

In advance of the hearings, Rep. Tom Lantos, D-Calif., a supporter of the deal, said Rice's testimony would put the nuclear cooperation issue "front and center for the first time."

The House committee's senior Democrat, Lantos described as "jarring" the disclosure this week that two Iranian ships have visited ports in India.

The State Department said the visits do not suggest India was training or contributing to Iran's military capabilities.