President Joe Biden may not be on the ballot this election cycle but his agenda hangs in the balance as Democrats defend their majorities in Congress.

Biden, making his final pitches to voters ahead of next Tuesday's races, is casting the midterms as a critical moment for the nation.

"I know there is a lot at stake in these midterm elections, from our economy, to the safety of our streets, to our personal freedoms, to the future of healthcare and Social Security and Medicare," Biden said this past week. "It's all important."

Republicans are favored to win back control of the House, according to FiveThirtyEight's midterm forecast. As for Senate control, the forecast shows a dead heat between Democrats and Republicans.MORE: Early vote count surpasses ordinary midterm turnoutA Republican majority in either chamber would doom Democratic priorities like climate change, voting rights and abortion access. And the remaining pieces of Biden's signature "Build Back Better" framework would likely meet a similar fate."I think there were certainly pieces that got left on the table, like the child tax credit and the universal pre-K, that would be very hard to do in a divided Congress," Jim Kessler, the executive director at the center-left think tank Third Way, told ABC News.Though Kessler had some optimism that bipartisan legislation could still get through a divided Congress, noting that many of Biden's major legislative achievements have gotten some Republican support: the CHIPS Act, the gun safety package and the infrastructure law.

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