Coast Guard Polar Security Cutter (Polar Icebreaker) Program: Background and Issues for Congress [Updated December 17, 2019] [open pdf - 2MB]
From the Introduction: "This report provides background information and issues for Congress on the Polar Security Cutter (PSC) program--the Coast Guard's program for acquiring new polar icebreakers. The PSC program has received a total of $1,034.6 million (i.e., about $1.0 billion) in procurement funding through FY2019. The Coast Guard's proposed FY2020 budget requests $35 million in procurement funding for the PSC program, which is enough to cover FY2020 program-management costs."
CRS Report for Congress, RL34391
Congressional Research Service: https://crsreports.congress.gov/