Senior Republicans claim that the potential prosecution of former US President Donald Trump would be a politically motivated move by his opponents.
On Saturday, Mr Trump suggested that his arrest could take place next week based on media reports.
However, Democrats argue that no one is above the law and accuse Mr Trump of recklessly stoking political divisions.
The case centers on alleged hush money paid by Mr Trump’s lawyer to porn star Stormy Daniels ahead of the 2016 presidential election.
While the 76-year-old is also the subject of several other separate inquiries, he denies any wrongdoing and has not yet been charged.
Mr Trump has vowed to continue his campaign to become the Republican nominee in the 2024 presidential election, even if he is indicted.
Former US Vice President Mike Pence and the most senior Republican in the US Congress, Kevin McCarthy, have both spoken out against any criminal prosecution.
Mr Pence labeled Manhattan district attorney Alvin Bragg’s investigation a “politically charged prosecution,” while Mr McCarthy called it “an outrageous abuse of power by a radical DA.”
Democrats, however, argue that any investigation must proceed appropriately, and that no one is above the law, regardless of whether they were president.
