Chris Murphy has expanded his Senate campaign war chest, adding $1.4 million in contributions from April to June, he said.

Murphy, a Democrat with national visibility for his gun control advocacy, now has approximately $8.5 million on hand, he said, ahead of the 2018 midterms in which he is up for re-election. His average contribution was under $60, he reported.

“There is so much at stake this election cycle,” Murphy said in a statement Monday. “I am so grateful for the grassroots financial support and for the trust that people all across Connecticut have put in me.”

U.S. senators and Senate candidates filed paper copies of their second quarter campaign finance reports on Sunday with the Secretary of the Senate, said a spokesman for the Federal Elections Commission. Data from their reports will be processed by the FEC and become publicly available over the next few weeks.