(CNN) Hillary Clinton slammed "disgraceful" Republicans in a series of tweets Monday night, calling their intensifying pledge to block anyone President Barack Obama's nominates to the Supreme Court a "new low."

8 I have news for Republicans who would put politics over the Constitution: Refusing to do your duty isn't righteous, it's disgraceful. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

"With these critical cases in the balance, Republicans wasted no time in vowing to block any SCOTUS nomination from @POTUS. A new low," Clinton tweeted in a series of 11 Tweets on the issue. "I have news for Republicans who would put politics over the Constitution: Refusing to do your duty isn't righteous, it's disgraceful."

10 As for complaints that this is an election year: 1988 was an election year, too—and Justice Kennedy was confirmed 97-0. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

11 So, a message for Senate Republicans: Fill this vacancy. @POTUS will do his job. Do yours. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

Clinton, who urged Democrats in Nevada to make the Supreme Court a political issue over the weekend, insisted that it is Obama's duty to fill the empty seat on the Supreme Court, citing high-stakes Supreme Court cases that currently hang in the balance.

1 Until Jan. 20, 2017, it's @POTUS' job to nominate Supreme Court justices—it's right there in the Constitution. -H pic.twitter.com/AWV47TRaTw — Hillary Clinton (@HillaryClinton) February 16, 2016

3 Right now, millions of families are waiting for SCOTUS to decide on @POTUS' executive actions on immigration. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

"The need to fill the Supreme Court vacancy is not an occasion for politics as usual," Clinton tweeted. "This has real and urgent stakes for Americans now."

5 And right now, a case from Texas could determine whether the right to abortion will be a reality for all or some. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

6 These decisions could determine whether we as a nation uphold our principles of liberty and equality, or turn back the clock. -H — Hillary Clinton (@HillaryClinton) February 16, 2016

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