President Obama's former speechwriter says he's "preemptively frustrated" with President Biden's effort to find unity with Republicans.What they're saying: Cody Keenan told Axios that Biden's messaging team has "struck all the right chords," but at some point "they're gonna have to answer questions like, 'Why didn't you achieve unity?' when there's an entire political party that's already acting to stop it."Get smarter, faster with the news CEOs, entrepreneurs and top politicians read. Sign up for Axios Newsletters here.Keenan spent 14 years writing for Obama, including working alongside Biden for eight of those years. He acknowledged being embittered by his own experience, especially after Sen. Mitch McConnell pledged to make his former boss a one-term president. * "Until the Republican Party steps up and tells their own voters what's really happening with the truth, it's going to be elusive," Keenan said. "It's not up to (President Biden) alone to deliver. He can't."Keenan helped Obama with the first volume of his memoir, "A Promised Land." He stopped working with the former president on New Year's Eve and has taken a full-time role at Fenway Strategies. The firm is run by another ex-Obama speechwriter — Jon Favreau — and presidential aide, Tommy Vietor. * "It just seemed like a natural spot after the book and the elections and, you know, [Obama] is not going to do a ton, especially with Biden in office," Keenan said.Keenan is also writing a book, titled "Grace," about the 10 days from the 2015 shooting at a historic Black church in Charleston, South Carolina, to the eulogy Obama delivered for Rev. Clementa Pinckney. * Obama ended by singing "Amazing Grace." * The title also nods to Keenan's newborn daughter, named Grace.Support safe, smart, sane journalism. Sign up for Axios Newsletters here.