WASHINGTON (AP) — Lawmakers racing to seal a bipartisan infrastructure deal early this coming week are hitting a major roadblock over how much money should go to public transit, the group's lead Republican negotiator said Sunday.

As discussions continued through the weekend, Ohio Sen. Rob Portman said both sides were "about 90% of the way there" on an agreement.

"We have one issue outstanding, and we're not getting much response from the Democrats on it," he said. "It's about mass transit. Our transit number is very generous."

Senate Majority Leader Chuck Schumer, D-N.Y., has said he want...