Вызывают споры первых четыре слова, к чему конкретно относится слово aggressive.

Буду рада помощи.

Ваш вариант приведите.... И крайне желательно указывать контект, чтобы было понятно как натурализация связана с деятельностью агентства.

Без этого только один вариант просматривается - агрессивное сокращение затрат

Сама статья:

WASHINGTON —U.S. Citizenship and Immigration Services today announced that the agency will avert an administrative furlough of more than 13,000 employees, scheduled to begin Aug. 30 as a result of unprecedented spending cuts and a steady increase in daily incoming revenue and receipts. USCIS expects to be able to maintain operations through the end of fiscal year 2020. Aggressive spending reduction measures will impact all agency operations, including naturalizations, and will drastically impact agency contracts. “Our workforce is the backbone of every USCIS accomplishment. Their resilience and strength of character always serves the nation well, but in this year of uncertainty, they remain steadfast in their mission administering our nation’s lawful immigration system, safeguarding its integrity and protecting the American people, even as a furlough loomed before them,” said USCIS Deputy Director for Policy Joseph Edlow. “However, averting this furlough comes at a severe operational cost that will increase backlogs and wait times across the board, with no guarantee we can avoid future furloughs. A return to normal operating procedures requires congressional intervention to sustain the agency through fiscal year 2021.”

Один из моих бывших начальников как-то сказал: Be aggressive! Перевод, по-моему, ясен.

Если же такой подход вызывает сомнения, то вариант с "решительными мерами" вызывает у меня наибольшее доверие.