WASHINGTON — Republican members of the House impeached Homeland Security Secretary Alejandro Mayorkas with a simple majority vote Tuesday. It sets off a series of choreographed rituals that dates back to the impeachment of former President Andrew Johnson in 1868. Here’s a look at what happens next. A Ceremonial Procession Once the House approves two articles of impeachment laying out the accusations against Mayorkas as part of its oversight and investigatory responsibilities, they are then walke