WASHINGTON — Republicans are gleeful over Democratic-engineered rule changes that will make it easier for President-elect Donald Trump to get his Cabinet nominees through the Senate. Yet Democrats see a lasting upside from what they did: allowing President Barack Obama to shape the federal judiciary for years to come.Democrats in 2013 scaled back the power of the Senate minority to throw roadblocks in front of a president’s nominees. In the years that followed, the Senate confirmed almost 100 federal judges …