Sen Ed MarkeyEd MarkeySenators ask airlines to offer cash refunds for unused flight credits Civilian Climate Corps can help stem rural-urban divide Senate votes to nix Trump rule limiting methane regulation MORE (D-Mass.) blasted President TrumpDonald TrumpCaitlyn Jenner says election was not 'stolen,' calls Biden 'our president' Overnight Health Care: FDA authorizes Pfizer vaccine for adolescents | Biden administration reverses limits on LGBTQ health protections Overnight Defense: US fires 30 warning shots at Iranian boats | Kabul attack heightens fears of Afghan women's fates | Democratic Party leaders push Biden on rejoining Iran deal MORE in the Democrat's weekly address, arguing he's trying to "rig" the Supreme Court. 

“Donald Trump railed against a rigged political system," he said in remarks released Friday evening. "But make no mistake, he’s trying to rig the Supreme Court against hardworking Americans. And we cannot let him."

Progressives, including Markey, quickly lined up against Neil Gorsuch after Trump named as his Supreme Court nominee on Tuesday evening. The Massachusetts Democrat called the looming confirmation battle "one of the most consequential in our nation's history."

"[Trump] has nominated a candidate for the Supreme Court who is outside the judicial mainstream," Markey said. “Judge Gorsuch’s record gives every American reason to be concerned that the basic protections that keep families safe, healthy and productive will be at risk."

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Markey pointed to Gorsuch's support for corporations and said he could be a "potential ally" for Trump to overturn Roe v Wade. 

Republicans, who hold 52 seats in the Senate, are pledging to confirm Gorsuch, who began meeting with lawmakers this week. 

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellManchin, Biden huddle amid talk of breaking up T package Romney: Removing Cheney from House leadership will cost GOP election votes The Hill's 12:30 Report - Presented by Facebook - Biden reverses Trump limits on transgender protections MORE (R-Ky.) is publicly pushing Democrats to let Trump's nominee clear the upper chamber on a simple up-or-down vote. 

But Democrats believe Trump's nominee deserves extra scrutiny, with Markey arguing a Supreme Court nominee must be able to stand up to the president's "assault on our core democratic values."

A 2013 decision Democrats, led by then-Majority Leader Harry ReidHarry Mason ReidBottom line Biden's first 100 days is stylistic 'antithesis' of Trump The Memo: Washington's fake debate on 'bipartisanship' MORE (D-Nev.), lowered the threshold for most nominations to a simple majority, but left the higher 60-vote procedural hurdle in place for Supreme Court nominations. 

Markey, who has already pledged to oppose Gorsuch, reiterated on Friday that Democrats would enforce the higher threshold. The move means Republicans will need to get at least eight Democratic senators to break ranks and support Gorsuch for his nomination to clear the Senate.  

“Senate Democrats are going to insist that Judge Gorsuch is subject to the same 60-vote threshold that President Obama’s nominees had to meet," Markey said. 

Sonia Sotomayor and Elena Kagan, Obama's two nominees, both received more than 60 votes but weren't subjected to the higher threshold or a cloture vote