US prosecutors during the hearing on Tuesday asked for more time to finish the investigation. The judge asked prosecutors to alert defense whether they will be ready to convert the status hearing into sentencing within four weeks.
According to Butina's lawyer Robert Driscoll, the US court may sentence Russian national in the beginning of April.
US District Judge Tanya Chutkan said that Maria Butina's cooperation "is still needed."
Meanwhile US Prosecutor Erik Kenerson said that cooperation with Butina was "ongoing," and asked that the judge therefore further delay a sentencing date for the Russian national.
In December 2018, the press office of the Russian Embassy in the United States said in a release that Russian diplomats have visited Maria Butina in US prison and demanded that the prison administration treats her humanely as they continue holding her in complete isolation.
The Russian Foreign Ministry said US authorities browbeat Butina into confessing by creating unbearable detention conditions and threatening her with a long prison sentence.