The AZ-06 House race remains tightly contested between incumbent Republican Juan Ciscomani and Democratic challenger JoAnna Mendoza, with prediction markets reflecting near-even odds amid a district rated as a toss-up or lean Democratic by most forecasters. An evenly split partisan voter index, prior narrow Republican wins, and limited recent polling averages near parity sustain the balance, as both candidates have raised substantial funds and targeted swing voters on issues including border security, taxes, and health care. Late-cycle campaign spending, turnout in Pima County precincts, and any shifts in national economic sentiment could widen margins before November 3. Minor candidates may also influence the final spread in this battleground seat critical to House control.