A step-by-step guide to Monday's Electoral College vote

We've known for weeks that Joe Biden won the 2020 presidential election, but our horse-and-buggy Constitution, written in a time before instant communication, works very slowly.

Since Election Day on November 3, all 50 states and the District of Columbia have certified their votes and named slates of electors, who will meet on Monday to formally cast their ballots for President and Vice President -- the next step in the process of finalizing Biden's victory.

Those ballots will be sent to Washington, where they will be counted by Congress on...