WASHINGTON—In a Senate Banking Committee hearing, Treasury Secretary Janet Yellen faced tough questioning from Senator Bill Hagerty (R-TN) regarding the Biden Administration's alleged targeting of Republicans labeled as "extremists." The scrutiny was centered around a document released last month, which revealed that the Financial Crimes Enforcement Network (FinCEN) had instructed financial institutions to monitor transactions for "extremist indicators," including support for former President Trump and purchases of religious books.Senator Hagerty raised concerns about the...