GOP senators have raised concerns about a new resolution that allows babies under a year old onto the Senate floor during votes but were not worried enough to vote against the measure.

While the measure cleared the chamber by unanimous consent, a number of Senators expressed that they are still unsure about the new rule introduced by Sen. Tammy Duckworth Ladda (Tammy) Tammy DuckworthMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled Biden courts veterans amid fallout from Trump military controversies John Fogerty: 'Confounding' that Trump campaign played 'Fortunate Son' at rally MORE (D-Ill.), who recently became the first senator to give birth while in office.

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Longtime Republican Sen. Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (Utah), who has six children, 14 grandchildren and 23 great-grandchildren, said he had "no problem" with the new rule for the chamber, but asked what would happen "if there are 10 babies on the floor of the Senate," according to The Associated Press.

Sen. Pat Roberts Charles (Pat) Patrick RobertsThe Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill GOP senators say coronavirus deal dead until after election MORE (R-Kan.) also told the AP that while he didn't object to the change, he didn't think it was "necessary" to allow newborns on the chamber floor.

But the move was heralded by Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.), and Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Senate GOP aims to confirm Trump court pick by Oct. 29: report Trump argues full Supreme Court needed to settle potential election disputes MORE (R-Ky.) and Senate Rules Committee Chairman Roy Blunt Roy Dean BluntSocial media platforms put muscle into National Voter Registration Day Senate GOP faces pivotal moment on pick for Supreme Court This week: Supreme Court fight over Ginsburg's seat upends Congress's agenda MORE (R-Mo.) did not stand in the way of the resolution.

"We are proud to have Senator Tammy Duckworth — working mom to a newborn — among our ranks and I’m glad the Rules Committee was able to swiftly make this historic rule change for her and future senators," Klobuchar said in a statement.

The new mother herself praised the Senate for "leading by example" to create a kid-friendly workplace for working moms.

Sen. Tom Cotton Tom Bryant CottonGOP brushes back charges of hypocrisy in Supreme Court fight Trump uses bin Laden raid to attack Biden Battle lines drawn on precedent in Supreme Court fight MORE (R-Ark.), a 40-year-old father of two, also said he had no issues with the rules change, but hedged his support for a suggestion by Roberts for the infants to only be allowed in the Senate's cloakroom as "a good compromise."

Duckworth, who uses a wheelchair after losing both of her legs during her military tour in Iraq, said that the room was not wheelchair accessible. Some senators initially proposed an exception for her case.

While senators of both parties have reportedly expressed concerns in private, Klobuchar said that reassurances by Republicans and Democrats have “been going on for weeks.”

For Sen. Marco Rubio Marco Antonio RubioOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats step up hardball tactics as Supreme Court fight heats up Press: Notorious RBG vs Notorious GOP MORE (R-Fla.) joked that the new rule won't be a huge change for the overwhelmingly elderly group of senators.

"Why would I object to it? We have plenty of babies on the floor,” the 46-year-old joked.