WASHINGTON (AP) — The head of the Senate Intelligence Committee said Tuesday that she shouldn’t have speculated about the White House’s responsibility for national security leaks because she didn’t know the source of the unauthorized disclosures.

Just hours after Republican presidential candidate Mitt Romney seized on her comments to criticize President Barack Obama, Sen. Dianne Feinstein, D-Calif., issued a statement offering her regrets about her observation while insisting that she was confident the president did not disclose classified information.