She ran for the Senate seat vacated by Democrat Hollis French in 2014 , picking up the seat to add to the Republican Senate Majority .
Costello served on the House Finance Committee and as chair of the Natural Resources Finance Subcommittee .
Costello ran for the Senate seat vacated by Democrat Hollis French in 2014 , picking up the seat to add to the Republican Senate Majority .
Costello served on the House Finance Committee and as chair of the Natural Resources Finance Subcommittee .