Complex sentence: Papadopoulos revealed that he had inside information by bragging that the Kremlin had "thousands of emails" stolen from Hillary Clinton which could be used to damage her campaign, two months before the DNC emails were actually released by WikiLeaks.
Split into simpler sentences: Papadopoulos revealed that he had inside information by bragging that the Kremlin had "thousands of emails" stolen from Hillary Clinton which could be used to damage her campaign. This happened two months before the DNC emails were actually released by WikiLeaks.