Power couples are the lifeblood of Washington so it’s not unusual for political activists, judges, and White House bigwigs to rub elbows at fancy soirees like the October gala at the Kennedy Center. But Max Stier’s longtime ties to the Democratic Party, his access to key Biden administration officials, and his suggestion that Trump represents a threat to democracy at the same time his wife is handling sensitive matters related to the Department of Justice’s prosecution of the former president should raise questions about her impartiality…