Former Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE urged supporters on Friday to "speak out" against Senate Republicans' healthcare overhaul bill, casting the matter as a choice of "people over politics."

"@BarackObama is right. This is a critical moment about choosing people over politics. Speak out against this bill," Clinton wrote on Twitter.

.@BarackObama is right.

This is a critical moment about choosing people over politics.

Speak out against this bill.https://t.co/mApxdKASlC — Hillary Clinton (@HillaryClinton) June 23, 2017

In her tweet, Clinton shared a link to former President Barack Obama's Thursday Facebook post assailing GOP lawmakers' efforts to repeal and replace the Affordable Care Act.

Senate Republican leaders revealed their version of healthcare reform legislation on Thursday after weeks of crafting the bill in secret.

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Democrats and some moderate Republicans have voiced concern over the Senate bill's proposed cuts to ObamaCare's Medicaid expansion and its prohibition on federal funding for Planned Parenthood, among other issues.

Obama railed against the proposal on Thursday, writing in a nearly 1,000-word Facebook post that the Senate measure is "not a health care bill," but rather "a massive transfer of wealth from middle-class and poor families to the richest people in America."

The ACA was among Obama's most significant legislative victories during his eight-year tenure in the White House.

House Republicans narrowly passed their version of a healthcare overhaul bill — the American Health Care Act — in early May.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE (R-Ky.) wants to vote on the Senate bill next week, though it remains unclear if Republican leaders will have the 50 votes they need to clear the legislation.

Republicans hold 52 seats in the Senate, but several GOP senators have criticized parts of the bill and called for negotiations.