text:  A Supreme Court ruling could affect the prosecutions of hundreds of the people who attacked the Capitol as Congress was trying to certify the 2020 presidential election. Many were charged with obstruction of an official proceeding, as is former President Donald Trump. And CBS's Jan Crawford explains the meaning of obstruction is at issue. In a 6-3 decision written by Chief Justice John Roberts, the court said the law requires prosecutors to show something more, that they impaired the availability or integrity of records and documents.