After spending much of his summer vacation on Kiawah Island, South Carolina, President Biden is heading back to his multimillion-dollar beach house in his home state of Delaware, where he’s building a taxpayer-funded security fence at a cost that’s ballooned to nearly $500,000. Biden is expected to arrive at his $2.7 million summer house in the North Shores community of Rehoboth Beach on Saturday after spending the last couple nights in Wilmington, Delaware….