If you mean the Congress of the Unites States of America, then that congress has the power to determine how non US citizens can (if they want) become US citizens. It does not have power to determine the rules for citizenship for any other country.
Yes, dual citizens can possess two passports from the countries they are citizens of.
expressed powers
The word "have" has synonyms including own, possess, or retain.has
Life, Liberty, Property.
Private citizens aren't permitted to own or possess firearms in Mexico.
It's not possible for one zodiac sign to possess another zodiac sign.
The Continental Congress went through three incarnations between 1774 and 1789. All three incarnations of this Congress possessed both legislative and executive powers.
Yes it does. The rights or UK citizens are enshrined in Common(Case) Law and the Laws of Parliament.
Agents of the FBI must be either native-born or naturalized US citizens. Agents must possess a college degree while administrative, and technical support staff need not (depending upon their duties). See: www.fbi.gov
Possessions, assets, property, belongings,
No, they cant possess firearms at all
No, an individual cannot legally possess both a Texas driver's license and another state's driver's license simultaneously.