(CNN) — Former President Joe Biden has decided to build his presidential library in his home state of Delaware, and is starting a fundraising push to fund the effort, according to a senior member of the Joe and Jill Biden Foundation.

The effort is expected to be a heavy lift, as presidential libraries carry hefty price tags totaling into the hundreds of millions of dollars. Biden has started fundraising later than his predecessors and the donor requests come as Democrats continue to grapple with their path forward and where to invest money .

The library will be a key part of efforts to burnish Biden’s legacy. Since leaving the White House, Biden, 82, has spent much of his post-presidency in Delaware but has only given a few public speeches.

In May, he began treatment for an “aggres

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