COLUMBUS, Ohio (AP) – Nearly everyone in the crowded Republican presidential field is preparing to battle for Ohio’s delegates, not conceding to Gov. John Kasich (KAY’-sik) on his home field.

Twelve candidates including outsider contenders Donald Trump and Ben Carson have filed delegate slates for the March 15 primary. Five Democrats led by Hillary Clinton also filed by Wednesday’s deadline for their party’s presidential primary.

Kasich has good favorability ratings as the state’s second-term governor. But he’s among several candidates struggling to gain enough traction for their campaigns to remain viable by the time the race comes to Ohio.

And if you think the presidential race is crowded, consider the race for the U.S. House seat in western Ohio vacated by former Speaker John Boehner after 25 years: 20 candidates including 17 Republicans filed.