Former vice president Joe Biden delivers the annual Class Day address on May 24 at Harvard University in Cambridge, Mass. (Steven Senne/AP)

Former vice president Joe Biden — still traveling the country on a national book tour — plans to make a detour Wednesday to meet with fellow Democrats preparing for a potentially historic election year.

Biden will launch the annual House Democratic policy retreat on Wednesday, which is being held over three days at a resort in Cambridge, Md. As vice president, he spoke at the retreat each year, usually in the shadow of President Barack Obama, who is not attending.

Biden is making stops across the country to promote his book, “Promise Me, Dad,” which is mostly about how the Biden family dealt with the brain cancer that killed his oldest son, Beau.

Democrats are gathering this week amid polling that shows them in a position to retake control of the House of Representatives and possibly the Senate. Recent fundraising reports also show dozens of Democratic congressional candidates raising impressive six-figure sums in the past fundraising quarter, in some cases topping the hauls of GOP incumbents.

Democrats attending their policy conference are also set to hear from Democratic National Committee Chairman Tom Perez; Topeka, Kan., Mayor Michelle De La Isla; Hoboken, N.J., Mayor Ravi Bhalla; former attorney general Eric H. Holder Jr.; former federal prosecutor Preet Bharara — a frequent Trump critic, and former Virginia governor Terry McAuliffe.

Holder and McAuliffe are poised to speak about the work they’re doing with Obama and other Democrats to push for changes in how state governments draw legislative boundaries.

House and Senate Republicans huddled last week at the Greenbrier resort in West Virginia, where they strategized for the year ahead and heard from President Trump, Vice President Pence and several Cabinet officials. Senate Democrats held a one-day strategy session last week at Mount Vernon in Virginia.