In interviews, Senate investigators said the agency's written assessments did a poor job of describing the debate over the intelligence.

"Some parts were flooding," he told Senate investigators earlier this month.

The Senate investigators may also speak with union officials.

Later analyses by Senate investigators indicated he cashed them to pay personal expenses.

The loans are under investigation by Senate investigators and state regulators.

Senate investigators say the cult recruited at least two nuclear scientists in Russia.

The scientific work helped Senate investigators "rule out certain terrorist activities," he said.

Even so, Senate investigators are increasingly confident that the episode was natural in origin.

The Senate investigators will face the same obstacle when they try to trace some of the contributions to the Clinton campaign.

Senate investigators obtained a 41-minute video of one building's interior.