State Assembly Majority Leader Joe Morelle has officially announced his candidacy to fill the late Rep. Louise Slaughter's congressional seat in the 25th District.

State Assembly Majority Leader Joe Morelle has officially announced his candidacy to fill the late Rep. Louise Slaughter's congressional seat in the 25th District.

Morelle, a Democrat, launched his campaign Monday morning. He was joined by Mayor Lovely Warren, County Clerk Adam Bello, and members of the family of Louise Slaughter for the announcement.

"I'm a progressive Democrat," Morelle says. "I care about working men and women. I care about healthcare, making it affordable and accessible for everyone. Those are the kinds of things I've always believed in and I'm willing to go out and talk to people."

Morelle said he talked with his family about running as well as with Slaughter's family, who's death suddenly opened up the 25th Congressional District seat. Slaughter's daughter Robin Minerva and son-in-law were both in attendance for the announcement. Morelle gratefully acknowledged them, and talked about his longtime friendship with Slaughter and said he's ready to make his case to succeed her.

"I love Joe. I think he would follow my mom's values," Minerva says. "He's been a great representative for Monroe County. He loves the area. He grew up here. He stayed here, lived here. He would really represent Monroe County very well."

There are a number of others are eyeing the vacated seat, including former journalist Rachel Barnhart and Brighton Town Board Member Robin Wilt.

Van White, the Rochester City School Board president, tells News10NBC he will seek the 25th Congressional seat. Rochester businessman Andrew Gilchrist announced his candidacy last week.

Rochester Deputy Mayor Cedric Alexander has announced he is not going to run for the seat. He released the following statement Monday:

"I have been overwhelmed by the number of people who have reached out and encouraged me to consider a run for Congress. I have taken their advice and I have strongly considered running, however at this moment I do not believe it is the right time for me to run. While I believe my unique experience and background would serve our community well in Washington, I am very committed to helping Mayor Warren deliver her agenda for this great city and I believe my work as Deputy Mayor is not finished. Congresswoman Slaughter has set the bar very high for our next Congressional Representative and I am hopeful they will honor her service by matching her work ethic and dedication to serve all the people. I will help them succeed in any way I can."

The only Republican to announce his candidacy so far is Rochester neurosurgeon Jim Maxwell.

Candidates for the seat have until April 12 to get 1,250 signatures from party members.

Stay with News10NBC on-air and online for more on Morelle's run for Congress.