Rep. Tom Cotton (R-Ark.) outraised Sen. Mark Pryor (D-Ark.) during the second quarter of the year, bringing in about $2.3 million to Pryor's $1.5 million.
Cotton is running against Pryor in one of the most crucial battleground contests of 2014. The Republican announced his haul on Monday morning; Pryor released his totals on Friday.
Neither campaign Pryor's campaign said it ended June with with $4.1 million in the bank. Cotton's campaign did not release its cash on hand total.
Second quarter campaign finance reports must be submitted to the Federal Election Commission by Tuesday.