Paul Manafort, the former campaign chairman for Donald Trump, should serve a lengthy prison term for “bold” criminal actions that were orchestrated over more than a decade, special counsel prosecutors told a Washington federal judge in a court filing unsealed Saturday.

Manafort is set to be sentenced March 13 in Washington on charges that include two counts of conspiracy. The first count includes money laundering and failing to disclose his foreign lobbying work, and the second is related to witness tampering. Prosecutors said they support a guideline range between 17.5 years to 22 years in prison. Manafort, prosecutors said, is not entitled to any reduction in his sentence. The government did not present a single mitigating factor.