Recent history has provided White House chief of staff Jeff Zients with two road maps he could follow now that House Republicans have officially launched an impeachment inquiry against President Joe Biden. He could take the approach former President Bill Clinton’s administration did and comply with the House’s request even as he offers a solid defense of the president. Or he could take a page from former President Donald Trump’s playbook and dig his heels in against Congress. Both Clinton’s strategy and Trump’s strategy worked,