Sen. Catherine Cortez Masto, the first Latina elected to the Senate, will hold onto her seat in Nevada after enduring a bruising campaign against Republican Adam Laxalt, who fell short of ousting the Democrat despite severe midterm headwinds, NBC News projects.

The outcome follows days of protracted mail-in ballot counting, with the results resting largely with the state’s most populous county, Clark County, which posted updates once a day since Tuesday. A race long predicted to be within the margin of error was indeed close through the end.

“Thank you, Nevada!” Cortez Mastro tweeted Saturday evening shortly after NBC News and other outlets projected her win.