Reminder: There are 63 days until the Iowa caucuses and 337 days until the 2020 election. It’s been the Big Assumption driving the Democratic presidential primary, the thing that all the major players — from the savvy Sunday morning show pundits to the candidates themselves — have simply taken for granted: Joe Biden may be leading in the national polls now, but there’s no way he’s actually going to win the nomination. No matter: Biden immediately shot up to 41 percent in the national polls.
