Joe Biden’s resurgence to become the Democrats’ presumptive nominee is opening new paths to defeat President Trump, swing-state polls show.

The big picture: If Biden can keep his current leads over Trump in general-election matchups, it could create opportunities for pickups of three big states — Florida, Arizona and North Carolina.

That’s without hurting Dems’ chances to take back Michigan, Wisconsin and Pennsylvania, the key wins that sent Trump to the White House in 2016.

The Real Clear Politics national polling average shows that either Biden (+5.9%) or Sanders (+4.2%) would have been positioned to defeat Trump if the election were held today, but the role of the Electoral College means the results will come down to a handful of key states.