Castelli and Murphy are campaigning for the Republican nomination in the 40th State Senate district in the seat held by Greg Ball. The winner will face off against Justin Wagner.
A debate will be held at the North Salem Ambulance Corps tomorrow at 8 p.m. between the two men.
Castelli is running having served two terms in the assembly.
"The campaign is going well," Castelli said. "We have taken a positive turn. We have taken the high road."
The campaign has been marred by anonymous mailings sent out, saying Castelli is pro-abortion and another with a picture of Castelli walking with Andrew Cuomo and the Clintons. Murphy has condemned the mailings.
"That picture was taken at a Memorial Day Parade," Castelli said.
As an assemblyman, Castelli said he had a reputation for being bipartisan.
"I worked to get things done," Castelli said. "I had a good working relationship with the governor and I am not ashamed of it. He was the chief executive. You must be able to reach across the aisle and work with people from the other party."
Castelli said he would like to lower taxes, create jobs, and repeal Common Core and the SAFE Act.
"I am the candidate the people wanted to run," Castelli said.
Murphy said his record of cutting taxes and creating jobs in Yorktown makes him the man for the job.
"This is a time of need," Murphy said. "It's a matter of keeping a roof over your head and food on the table."
Murphy, who was the nominee of the Republican Party, said a primary is what democracy is all about.
"I look forward to representing the people of the 40th district," Murphy said.
If elected, Murphy said he will take on the region's heroin epidemic and work to lower taxes.
"We've lost 400,000 people in the state," Murphy said. "We're upside down. We're the highest tax state in America and the least business friendly. We've had a mass exodus."
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