Why it matters: McConnell wants to get Senate Democrats, especially the 2020 presidential election hopefuls, on the record about their support of the sweeping climate resolution. The Trump White House believes that tying Democrats to socialist policy ideas like the Green New Deal could be the key to victory in 2020.

Go deeper: The fight Trump and AOC both want in 2020

The big picture: The non-binding resolution envisions a massively expanded federal role in emissions-cutting and economic intervention that takes its cues from World War II and New Deal-era programs.

• NPR posted a copy online here.

Drill down: Some of the resolution's top-line goals include...

• Achieving net-zero U.S. greenhouse gas emissions through a "fair and just transition for all communities and workers" while creating millions of jobs.
• Decarbonizing all the major segments of the economy — power, manufacturing, buildings, transportation and more.
• Huge investments in climate-friendly infrastructure.
• Protections for indigenous people, communities of color, the poor and others under the heading of "frontline and vulnerable communities."
• A goal of universal health care and jobs guarantees.

What to watch: Ocasio-Cortez and Markey are holding a press conference on Thursday and will unveil the list of resolution's backers, so it'll be interesting to see how many of the 2020 Democratic hopefuls currently in Congress choose to sign on.

• Axios has already learned that co-sponsors will include Sens. Cory Booker (D-N.J.) and Kirsten Gillibrand (D-N.Y.), who are both in the race. The Washington Post now reports that Sens. Kamala Harris and Elizabeth Warren are also co-sponsors.
• Several other candidates have broadly endorsed the concept of the Green New Deal.
• As the Washington Post's Jeff Stein points out, the resolution's arrival means that White House hopefuls will now be asked about something more concrete.

How it works: The many broad concepts in the resolution include "meeting 100 percent of the power demand in the United States through clean, renewable, and zero-emission energy sources."

• It calls for energy efficiency in "all existing buildings" and new buildings, too, as well as cutting emissions from transportation as much as technologically possible.
• The intrigue: That phrasing seems to leave the door open to technologies that some activists oppose (such as fossil fuels with carbon capture and nuclear energy), but doesn't name-check any of them, though Ocasio-Cortez's chief of staff has broadly said that the goal is a transition from fossil fuels.

The big question: There's no specific projected cost for what would be massive federal investments under the resolution.

• The plan broadly calls for grants, public banks and other public financing. It also highlights federal investments in "new clean and renewable energy technologies and industries."

What they're not saying: The plan is silent on whether it would impose a carbon tax. Some Green New Deal advocates have said a tax could be part of the policy — but don't see it as a central pillar.

What's next: The resolution is basically a political messaging document, so look for Green New Deal advocates to put more meat on its bones with legislation and papers in the coming months.

• A bill based on the resolution would have zero chance of becoming law now — and a steep uphill climb in the foreseeable future, even if Democrats gain more power in Washington.
• But it lays down a marker that could push Democrats toward embracing aggressive climate policies to promote through 2020 and beyond.

Go deeper:

• The first lawmakers lining up behind AOC's Green New Deal resolution
• 2020 pressure for Green New Deal

Alexi McCammond contributed to this reporting.

Editor's note: This post is being updated as new information comes in.

• Sen. Cory Booker (D-N.J.) invited a former prisoner from Chicago who was released last month after Trump signed the bipartisan criminal justice reform First Step Act in December. Booker was one of the original co-sponsors of the bill, and he's made criminal justice reform part of his focus in the Senate. His presidential platform includes comprehensive plans addressing the legalization of marijuana, better treatment for incarcerated mothers and workplace discrimination against those who have previously been incarcerated.
• Sen. Kirsten Gillibrand (D-N.Y.) invited a transgender Navy lieutenant commander. Gillibrand is expected to introduce new legislation this week that would further protect transgender military members in the wake of the Supreme Court decision allowing Trump's ban on transgender troops serving in the military, per HuffPost.
• Sen. Kamala Harris (D-Calif.) invited a woman who survived the Thomas Fire in California, but lost her home to the wildfire. Her guest is also an air traffic control specialist who was furloughed during the shutdown. Harris is keeping the focus on an issue that plagued her home state of California, an early primary state in 2020. Last month, she slammed Trump for "threatening to withhold money from survivors of a deadly natural disaster."
• Sen. Elizabeth Warren (D-Mass.) invited a federal employee — from the Department of Housing and Urban Development — who was furloughed during the recent government shutdown. This reflects her message of economic equality and how "America’s middle class is under attack." It also comes less than two weeks before the Feb. 15 deadline for another potential government shutdown.

Between the lines: There's a clear divide between the types of guests invited by Republican and Democratic members when it comes to the issue of immigration. The GOP largely invited law enforcement officials who work along the border or parents whose children have been killed by unauthorized immigrants. Democrats invited people like DACA recipients or undocumented workers who were recently fired from Trump's golf courses.

Go deeper: The full list of lawmakers' guests for the State of the Union