Rep. Gary Peters, D-Mich., reported the strongest first-quarter fundraising numbers of all of the federal candidates eyeing retiring Democratic Sen. Carl Levin’s seat.

Peters, who is considering a Senate bid, raised $373,000 and reported having more than $800,000 in cash on hand at the end of March.

First-quarter fundraising reports for members of Congress were due on Monday. Peters raked in more than his potential GOP Senate rivals — Reps. Mike Rogers and Justin Amash — combined. However, Rogers maintains a large cash-on-hand advantage.

Amash raised $124,000 and reported $114,000 in cash on hand.

Rogers, chairman of the House Intelligence Committee, raised about $166,000 in the first quarter and reported having $1.4 million in the bank. Rogers recently told CNN that his prime spot on the committee weighed on his decision-making process.

(Read more about Senate race fundraising in Roll Call)

Several other Republicans outside Congress continue to mull campaigns for the Senate seat, including former Michigan Secretary of State Terri Lynn Land, cardiologist Rob Steele and ex-state GOP Chairman Saul Anuzis.

Debbie Dingell, the wife of longtime Rep. John D. Dingell, D-Mich., continues to think about running for Senate. The Detroit News reported she will make a decision by the end of this week.

Meanwhile, a spokesman for Rep. Dan Kildee, D-Mich., told The Associated Press over the weekend that the freshman congressman would not seek the Democratic nomination.