The Democratic Party’s push to re-gain the White House is slowly but surely drifting from the nomination process to the November election.

But are the unions already there?

The Missouri AFL-CIO, along with the state’s bricklayers’ union, announced today that dozens of labor supporters will take part in a door-to-door canvass Saturday to “educate union voters” about John McCain’s stance on issues such as health care, trade and the economy.

In particular, a spokeswoman said, the canvass will highlight McCain’s proposal to do away with job-provided health insurance. Instead, McCain is proposing to give families a $5,000 a year tax credit to buy their own.

Participants in the statewide effort will gather in St. Joseph, Kansas City and Bridgeton, and be part of a national “McCain Revealed” push in battleground states.

In Missouri, this weekend’s canvass is targeting the very type of voters - blue-collar “Reagan Democrats” popular in Rust Belt states like Ohio and Pennsylvania - that will be a key swing demographic for the Barack Obama campaign.

While the union push this week is decidedly anti-McCain, will it be pro-Obama? Or fueled by the final hopes of a Hillary Clinton nomination?

Could be something to ask if they knock on your door this weekend.