Complex sentence: Bradlee's demand for thoroughness forces the reporters to obtain other sources to confirm the Haldeman connection; when the White House issues a non-denial denial of the Posts above-the-fold story, the editor thus continues to support them.
Split into simpler sentences: Bradlee's demand for thoroughness forces the reporters to obtain other sources to confirm the Haldeman connection. When the White House issues a non-denial denial of the Posts above-the-fold story, the editor thus continues to support them.