Sen. Rob PortmanRobert (Rob) Jones PortmanTrump faces political risks in fight over GM plant GOP moves to rein in president's emergency powers The 25 Republicans who defied Trump on emergency declaration MORE (R-Ohio) has introduced an amendment to the Republican budget that would boost Medicaid funding for "medically complex" children

The Ohio Republican's amendment would create a deficit neutral fund that would focus on increasing integrated and coordinated care for children on Medicaid who have multiple, serious, rare or chronic illnesses.

"This amendment would correct that fragmented system," Portman said. "I've talked to the parents. ... They tell me they are deeply grateful for the coordination."

Portman, who is up for reelection in 2016, suggested that coordinated care could help reduce costs.

Sen. Bernie SandersBernard (Bernie) SandersDemocratic Socialists of America endorses Sanders for president Trump on 2020 Dems skipping AIPAC: 'I think they're anti-Jewish' The Hill's Morning Report — Washington readies for Mueller end game MORE (I-Vt.), the ranking member of the Budget Committee, said, while Portman's amendment "touches upon a serious issue,” it’s a bigger problem that the Republican budget would repeal ObamaCare and cut Medicaid.

"The amendment that Sen. Portman is offering deals with only one, tiny and small part of what the Republican budget is doing," Sanders said. "What the Republican budget is doing is decimating healthcare in the United States of America."

Sanders, who is considering a run for the presidency in 2016, introduced an amendment that would shield Medicaid from budget cuts.

"Let's not sit around and say, ‘Well, we're making progress in one area, but we don't care about the millions of people who have been thrown off Medicaid,' " Sanders said.

The Vermont senator urged his colleagues to support Portman's amendment but said they should "also vote for my amendment.