Democratic Rep. Ruben Gallego begins TV ads as the Arizona US Senate race takes shape without Sinema Boston 25 News [Video]

PHOENIX — (AP) — Democratic Rep. Ruben Gallego began airing the first television ads of his U.S. Senate campaign on Tuesday as the crucial Arizona race takes shape as a one-on-one contest after incumbent Kyrsten Sinema declined to run for a second term.

Gallego’s ad introduces him to voters as a U.S. Marine who served in a unit that faced especially fierce fighting in Iraq and lost 48 men.

The Arizona race is one of a handful of contests that will determine control of the Senate. It is now ramping up after Sinema, who was elected as a Democrat but left the party, made clear she would not enter the race as an independent candidate, paving the way for Democrats to line up behind Gallego.

Gallego is emphasizing his military service and financially humble upbringing as he looks to expand his stature beyond the safely Democratic district in Phoenix that he’s represented since 2015.

In his ad, Gallego …