Matthew Miller, a spokesman for the State Department, stated on Wednesday that the US was closely monitoring any steps taken against Indian opposition groups.
Hours before, on Tuesday, Mr. Miller made a similar remark that led India to call a US official.
Following his incarceration last week, Mr. Kejriwal has refuted any misconduct.
The primary opposition Congress party in India said at a press conference a few hours prior to his detention that the tax department had stopped its bank accounts in anticipation of the general elections.
The Congress and Mr. Kejriwal’s Aam Aadmi Party (AAP) have accused the ruling Bharatiya Janata Party (BJP) administration of having a political vendetta. The maverick politician who challenged India’s Modi, the chief minister of Delhi, has been arrested amid allegations of corruption. Modi is reported to have exploited the tax office to hobble the opposition.
The BJP refutes the accusation, claiming that the investigative agencies were operating on their own.
The Congress party’s claims that the freezing of its financial accounts “would make it challenging to effectively campaign in the upcoming elections” were known to the US, according to Mr. Miller, who spoke with reporters on Wednesday.
