What powers congress should be taken away?
power to vote themselves raises, as well as the right to serve unlimited terms
No they did not, although some Republicans (who are the majority) have said they believe he has too much power and they would like to limit it. But whatever they believe, there is no bill that could take away a president's powers, since the US Constitution mandates that each branch is separate and has its own set of duties. Congress could try to overturn an executive order, or obstruct one of the president's priorities, but…
It should be self-evident from historical examples that the answer is yes. If you disagree, talk to any European Jew over 65. The US Constitution explicitly grants certain rights to the people, which cannot be taken away by an ordinary law. However, even these could be taken away by a constitutional amendment.