McSally launches 2020 campaign

Sen. Martha McSallyMartha Elizabeth McSallyTrump: GOP senators who don't embrace him will 'lose their elections' McConnell warns control of Senate 'could go either way' in November The Hill's Campaign Report: Biden picks Harris as running mate MORE (Ariz.), a Republican facing one of the toughest elections in November, launched her 2020 campaign Tuesday.

McSally’s campaign launched with a video featuring several supporters that she said “inspire” her to continue serving in the Senate. It touches on issues including prescription drug costs, sexual assault, human trafficking and improving access to mental health care. 

“Those are just a few things we can agree upon in a bipartisan way, but there’s so many more. It’s an absolute honor to represent Arizona, and I humbly ask for the opportunity to continue to serve,” she says in the video.

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McSally lost her 2018 campaign to then-Rep. Krysten SinemaKyrsten SinemaWhy Trump, GOP are running into trouble in Arizona Gun control group to spend at least million in Arizona ahead of November Democratic super PAC targets McSally over coronavirus response MORE (D-Ariz.) for the seat formerly held by Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeCheney clashes with Trump Sessions-Tuberville Senate runoff heats up in Alabama GOP lawmakers stick to Trump amid new criticism MORE (R-Ariz.), who retired. McSally was later appointed to a seat vacated by the late Sen. John McCainJohn Sidney McCainDemocrats hammer Trump for entertaining false birther theory about Harris Trump rips Bill Maher as 'exhausted, gaunt and weak' The Hill's Morning Report - Presented by Facebook - The choice: Biden-Harris vs. Trump-Pence MORE (R-Ariz.). 

She faces a tough challenge this year from Democratic candidate Mark Kelly, a former astronaut and husband of former Rep. Gabby Giffords (D-Ariz.). Giffords became a gun control advocate after surviving an assassination attempt in 2012. 

Kelly has been outraising McSally in the race. He has more than $13 million on hand, while McSally has just around $7.7 million on hand. 

The Cook Political Report rates the race as a “toss-up.”