NEW: Karoline Leavitt will leave her role at the White House at the end of the month to spend more time with her young children and family. Leavitt calls servi

NEW: Karoline Leavitt will leave her role at the White House at the end of the month to spend more time with her young children and family. Leavitt calls serving as press secretary for the past year and a half the honor and adventure of a lifetime, while acknowledging the challenges of balancing th…