A New Jersey Democrat and Navy veteran came to the defense of vice presidential candidate Tim Walz, saying the accusations questioning his military record are “incredibly offensive” and reminiscent of the “Swiftboat bulls—” that Sen. John Kerry faced in his presidential election. Rep. Mikie Sherrill spoke with CNN host Kaitlan Collins on Thursday night on “The Source” and called the attack against Walz — who served in the National Guard for 24 years — a “slanderous” attack against his “honorable service.” Sherill said Walz retired before the announcement was made that his troops would be dep…