Hunter Biden owes his ex-wife $2.9 million after a protracted legal battle — and now his one time spouse is expected to be a key witness in his looming trials. Kathleen Buhle, who was married to the first son for 24 years before they split in 2017, claims Hunter has blown off agreed-upon alimony payments, legal fees, interest and other debts to her over the years. Buhle sued Hunter in 2019, shortly after he married current wife Melissa Cohen. The dispute with Buhle has been simmering in Washington, D.C. courts for years, and in 2021 Hunter was found to be...