Republicans said Sunday that the Internal Revenue Service's heightened scrutiny of conservative political groups was "chilling" and further eroded public trust in government.
Lawmakers said President Barack Obama personally should apologize for targeting tea party organizations and they challenged the tax agency's blaming of low-level workers.
"I just don't buy that this was a couple of rogue IRS employees," said Sen. Susan Collins, R-Maine. "After all, groups with 'progressive' in their names were not targeted similarly."
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