Sen. Tammy Duckworth, who recently became the first sitting senator to give birth, has introduced a resolution that would let senators bring children younger than 1 year old onto the Senate floor during votes.

The Illinois Democrat, who previously raised questions about parental leave policies in the Senate, gave birth to her second daughter earlier this month. 

Senators must be present on the floor to cast votes, and cannot vote by proxy like they can on committees. 

"I can’t be away from a newborn infant in the first three months for that long,” Duckworth said to Politico in February.

Duckworth wants to be able to vote on the Senate floor even while she takes an unofficial maternity leave, according to Politico. The Senate Rules Committee is expected to move the measure as soon as this week. The offices of Committee Chairman Roy Blunt and ranking member Amy Klobuchar said they support the rule change, Politico reported.

After moving through the committee, the resolution needs to be approved by the Senate.

Duckworth Chief of Staff Kaitlin Fahey said Duckworth is "optimistic that this will be resolved quickly."

"After many positive, constructive conversations with her colleagues on both sides of the aisle, Senator Duckworth is glad to be able to offer this legislation to ensure no senator with an infant is prevented from performing their constitutional responsibilities—and send a message that working parents everywhere deserve family-friendly workplace policies," Fahey said in a statement.