Ohio's Sen. Rob Portman's decision to retire opened a major new battleground in the fight for Senate control in 2022. But after former President Donald Trump easily carried the buckeye state last November, do Democrats have a shot at flipping the seat?

FiveThirtyEight's Nate Silver gave ABC's "This Week" an early forecast.

"Democrats have a chance, it's just not a very good chance … it probably depends on the GOP having a really weak candidate or Democrats, a very strong one," he said Sunday.

With logistical plans hampering vaccine rollout across the country, Martha Raddatz travels to West Virginia to speak with Governor Jim Justice and Senator Joe Manchin about the state's successful vaccination launch.

Dr. Richard Besser and Arkansas Governor Asa Hutchinson will also respond to reports of new COVID variants reaching the U.S.

Plus, as Democrats push forward on President Biden's COVID relief bill, Martha Raddatz will go one-on-one with Sen. Bernie Sanders to discuss the prospects for bipartisan compromise, and the Powerhouse Roundtable breaks down Donald Trump’s influence on the future of the Republican Party.

President Donald Trump is parting ways with the lawyer who was supposed to anchor his impeachment trial -- beginning in just a little over a week, sources told ABC News.

The former president will no longer be working with South Carolina attorney Butch Bowers and his associates, including Deborah Barbier. A source close to the former president described the change as a "mutual decision" between the parties. Sen. Lindsey Graham, who urged Bowers to take the case, had told his Senate GOP colleagues Jan. 21 that Bowers would be representing Trump.

"The Democrats' efforts to impeach a president who has already left office is totally unconstitutional and so bad for our country. In fact, 45 Senators have already voted that it is unconstitutional. We have done much work, but have not made a final decision on our legal team, which will be made shortly,” Jason Miller, a spokesperson for Trump, told ABC News Saturday.

It's not clear who will be representing Trump, with several options now off the table.

Trump's former top lawyer, Jay Sekulow, who represented him at his first impeachment trial, will not be taking part in this trial. Rudy Giuliani, Trump's personal lawyer, also said he will not be representing the former president after appearing at the same rally that preceded the siege on the Capitol on Jan. 6.

The Senate trial is scheduled to start on Feb. 9. Regardless of who represents Trump, not enough GOP senators have shown an inclination to convict him.

Read more about the tumult in Trump's impeachment legal team here.

-ABC News' John Santucci

It's the second Saturday of the Biden administration, and things are again quiet at 1600 Pennsylvania Avenue.

Biden does not have any public events on his schedule this weekend and does not include any mention of the work he may be doing behind the scenes amid the negotiations over his COVID-19 rescue package.

Biden's Saturday schedule last week included that he would be meeting with his advisers in the Oval Office despite that meeting being closed to the press.

It's not unusual for Biden's weekends to be on the quiet side. Outside a few Saturday events toward the end of the transition or outings to go to Mass, Biden focused most of his public schedule on the traditional workweek. Still, in the midst of the pandemic and negotiations over the nearly $2 trillion proposed rescue package, it's notable how low a profile the new administration is keeping on the weekend.

Biden's White House Chief of Staff Ronald Klain did give a short overview of the White House agenda Saturday, responding to a tweet from Sen. Amy Klobuchar expressing the odd feeling of waking up on a Saturday and not having to contend with a tweet from President Trump.

“Quick tweet to say we're working at the WH today on next steps in the COVID response, making sure we're ready for the winter storm, and advancing the American Rescue Package," Klain tweeted in response.

-ABC News' Molly Nagle