Sen. Mark Kelly (D-AZ) announced Thursday that the Department of Homeland Security had agreed to fill in a gap that was left between Trump-era border wall projects in response to his pressuring the White House to secure a vulnerable spot in Yuma, known as the Morelos Dam.

“For too long, the Morelos Dam area has been an operational challenge for Border Patrol agents to properly secure the border and keep our communities safe,” Kelly said in a statement. “I’m glad that the Department of Homeland Security has listened to Arizona and is going to close these gaps. This is a step forward and I’ll keep working to ensure that Arizona has the tools needed for a secure and orderly process at the border including fencing and barriers where they make sense.”

The move is significant for Kelly, a first-term senator who faces a contentious reelection bid this November. He touted the win as having followed through on an immigration promise to his constituents.