The battle is threatening to stall an energy bill.
The Senate's energy bill faces a key hurdle.
The Senate will take up the legislation next week.
Cruz says Trump called Iowans "stupid" by not participating in a debate.
Sen. Inhofe is proposing using Energy Department funds to cover the Flint spending.
Cristina Marcos 02/03/16 05:05 PM EST
A bill would give agencies the option to use funds originally allocated for Ebola efforts.
Sen. Mike Lee of Utah objected to the nominees on Cruz's behalf.
Cristina Marcos 02/03/16 01:00 PM EST
"They shouldn't be made to pay the bill," Rep. Earl Blumenauer said.
"I promise you, the American people are watching," she said.
Sen. Debbie Stabenow suggested Democrats could block the legislation.