Gun violence victim along with former U.S. Congresswoman Gabby Giffords watches her husband, NASA astronaut Mark Kelly,  speak as they visits City Hall on her 2016 Vocal Majority Tour on October 17, 2016 in fresh York City.

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Gun violence victim along with former U.S. Congresswoman Gabby Giffords watches her husband, NASA astronaut Mark Kelly, speak as they visits City Hall on her 2016 Vocal Majority Tour on October 17, 2016 in fresh York City.

Mark Kelly, retired NASA astronaut along with husband of former Democratic Rep. Gabby Giffords, announced Tuesday of which he will run in 2020 for the Arizona U.S. Senate seat held by Republican Martha McSally.

Kelly, 54, announced the bid in a video posted to his Twitter account.

“I always knew of which I was going to serve of which country in some way,” said Kelly, who served inside Navy during the Gulf War along with was tapped to become a NASA pilot in 1996.

Kelly, a Democrat, highlighted his career as an astronaut inside four-minute video, which he captioned as “my next mission.” the item begins with him recounting his first experience witnessing a sunrise coming from a space shuttle.

“the item becomes pretty obvious pretty early when you get into space of which we’re all in of which together,” he said.

Kelly, who has never held political office, became politically active after his wife, Rep. Gabby Giffords, was shot in a 2011 assassination attempt at a Tucson supermarket. Six people died inside attack.

Giffords, who was shot inside head, resigned coming from Congress in 2012 to focus on her recovery. In 2013, Kelly along with Giffords launched a nonprofit supporting gun control.

inside 2018 midterms, McSally lost to Democrat Kyrsten Sinema in her bid for the seat of retiring GOP Sen. Jeff Flake. Republican Gov. Doug Ducey appointed McSally to fill the Senate seat of which had been vacated by the death of John McCain in August.

Kelly may not develop the field to himself, as competition coming from his own party may soon be on the horizon. Rep. Ruben Gallego, D-Ariz., said in a tweet of which he is actually “looking seriously at running for the U.S. Senate in 2020,” adding of which he will make an announcement “soon.”