Democrats are convinced that smoking guns and legal landmines are buried in millions of pages of documents from Judge Brett M. Kavanaugh’s past. But 500,000 pages into their search, they have yet to identify them. As Judge Kavanaugh prepares for his Senate confirmation hearing Tuesday, his judicial record captured in more than 300 opinions on the U.S. Circuit Court of Appeals for the District of Columbia, is getting little attention. Instead, the battle has been over access to more than 3 million pages of documents from his time in the Bush White House. “The other side has apparently found very...