The president celebrated his birthday in Washington with a brunch hosted by first lady Jill Biden, according to White House press secretary Karine Jean-Pierre.Jill Biden tweeted a photo of him blowing out a candle on top of a coconut cake, with balloons in the background.But Biden has not been able to shake voters’ apprehensions about his age, with rhetorical gaffes and literal stumbles at times reinforcing concerns about his health and mental acuity.And Saturday’s wedding marks a kickoff of sorts for the tight-knit Bidens to begin earnest discussions over whether their patriarch should seek a second term.On the other end of Pennsylvania Avenue, Nancy Pelosi, 82, recently announced plans to step down as House speaker, celebrating Democrats ushering in a new generation of leadership."