Right to keep and bear arms. this is the one he's after. Yet he's opening the door for all amendments.
This is a lie.
None of the proposed firearm regulations violate the Second Amendment.
President Biden is correct about no right being ‘absolute’:
“Like most rights, the Second Amendment right is not unlimited. It is not a right to keep and carry any weapon whatsoever in any manner whatsoever and for whatever purpose: For example, concealed weapons prohibitions have been upheld under the Amendment or state analogues. The Court’s opinion should not be taken to cast doubt on longstanding prohibitions on the possession of firearms by felons and the mentally ill, or laws forbidding the carrying of firearms in sensitive places such as schools and government buildings, or laws imposing conditions and qualifications on the commercial sale of arms.”
Because no right is absolute or unlimited, government has the authority to place limits and restrictions on the exercising of those rights, provided those limits and restrictions comport with the Constitution.
When government acts in accordance with the Constitution, it is not ‘clamping down’ on citizens’ rights – such a notion is both ignorant and wrong.
When government acts in a manner the people believe violates their rights, they are at liberty to seek relief in the courts to have acts of government repugnant to the Constitution invalidated.
All acts of government are presumed to be Constitutional until the Supreme Court rules otherwise, in deference to the will of the people as represented by the government they elected.