With which powers of the new government is brutus especially concerned?

Answer: The correct answer is : The power to tax

Explanation: Brutus was a character whose identity was unknown, it is only known that Brutus corresponds to a pseudonym of an antifederalist. The main objection Brutus had regarding the constitution was the great power of the federal government that required people to sacrifice their freedoms, he claimed that the declaration of rights was necessary to protect people

The power with which Brutus was especially concerned with and felt it was the most important power to be granted was the power to tax.

Brutus argued that under the Necessary and Proper Clause congress would be able to repeal state fundraising laws. According to him there was no limit upon the legislative power to lay taxes, duties, imposts, and excises.