President Trump’s net approval rating has plunged in every key battleground state since taking office in January 2017, according to Morning Consult’s tracking poll. . . . .

These are the states that Republicans and Democrats are vying for in 2020, and where, as of now, the campaigns think the presidential election will be decided, according to conversations with several Trump and Democratic campaign staffers.

In addition to the key purple states — Michigan, Pennsylvania and Wisconsin — that both sides recognize as targets, the Trump campaign has its sights set on Minnesota, Nevada, New Hampshire and New Mexico, all states Trump lost in 2016, several campaign officials said.