High-priority alert based on source significance and keyword relevance.
Context
What happened: Treasury yields above 5% are raising borrowing costs for households and the federal government, highlighting the challenge of financing $2 trillion deficits.
Key numbers: Treasury yields above 5%; $2 trillion deficits.
Why it matters: Higher yields increase the cost of servicing federal deficits and of borrowing for households, making deficit financing a central economic challenge.