WASHINGTON — As President Joe Biden prepared to deliver one of the biggest speeches of his presidency, he met with a close group of aides at the White House and read drafts aloud from top to bottom. He practiced in front of teleprompters at Camp David, making sure the language was relatable and clear. And, in quiet moments ahead of the State of the Union address Tuesday evening, he marked up his speech with subtle lines and dashes that he has long used as a signal to take a breath, pause between his words or steer through a tricky transition....