Complex sentence: The White House and the President's supporters claimed that they were exonerated by the Pillsbury Report, a $3 million study done for the Resolution Trust Corporation by the Pillsbury, Madison & Sutro law firm at the time that Madison Guaranty Savings & Loan was dissolved.
Split into simpler sentences: The White House and the President's supporters claimed that they were exonerated by the Pillsbury Report. This was a $3 million study done for the Resolution Trust Corporation by the Pillsbury, Madison & Sutro law firm at the time that Madison Guaranty Savings & Loan was dissolved.