GRAND RAPIDS, Mich. (WOOD) — Groups who say minority, elderly and poor voters would be disproportionately affected by a more restrictive voter ID bill put pressure on State senators Monday to stop the measure.

The bill, which was introduced by Republican Rep. Lisa Posthumus Lyons of Alto, has already passed in the Michigan House. In addition to signing an affidavit, voters who show up at the polls without a state issued ID would have to go to the clerk’s office within 10 days of their vote and present a valid ID in order for their vote to count.

“Tens of thousands of individuals cast a ballot this election without proving their identity. That means we don’t know if those people who cast their ballots were legally allowed to vote,” Posthumus Lyons argued in favor of the bill.

However on Monday, organizations including the American Civil Liberties Union held a press conference to say this bill is a solution in search of a problem. The groups pointed to a recent study which shows there is no credible proof of widespread voter fraud.

They also said if you look at other states that have instituted stricter voter ID laws, they disproportionately affect people of color, the elderly and the poor because they are the most likely to not have a state issued ID.

“There’s laws on the books that already protect us from voter fraud in that way. So when somebody signs an affidavit, they are saying with penalty of perjury that I am who I say I am. So if Lisa Lyons is really concerned about that, then we need to focus on enforcement of those provisions that already exist,” said Sean Egan with the International Brotherhood of Electrical Workers.

It’s unclear if and when the Senate may take up the bill.