Does the u.s. president have the ability to replace the v.p.if he resigned, or would the speaker become v.p.?

Answer 1

He can nominate but the 25th Amendment doesn't allow him the last say!

AMENDMENT XXV
Passed by Congress July 6, 1965. Ratified February 10, 1967.

Note: Article II, section 1, of the Constitution was affected by the 25th amendment.

Section 1.
In case of the removal of the President from office or of his death or resignation, the Vice President shall become President.

Section 2.
Whenever there is a vacancy in the office of the Vice President, the President shall nominate a Vice President who shall take office upon confirmation by a majority vote of both Houses of Congress.

Section 3.
Whenever the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that he is unable to discharge the powers and duties of his office, and until he transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the Vice President as Acting President.

Section 4.
Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.

Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office. Thereupon Congress shall decide the issue, assembling within forty-eight hours for that purpose if not in session. If the Congress, within twenty-one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty-one days after Congress is required to assemble, determines by two-thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.

Answer 2

The US president picks a replacement (who is approved by congress) if the current vice president resigns or dies in office. That is how Gerald Ford became Vice President, and then President (after Nixon resigned) without ever being elected to either office.

Answer 3

If the VP dies, resigns, or is otherwise removed from office (like Spiro Agnew under Nixon) then the President is allowed to appoint a new Vice President, who must be confirmed by Congress (like Gerald Ford was).

Answer 4

This happened when Agnew resigned and Nixon nonimated Gerald Ford to be Vice Prdesident, the nonimation is approved by the senate & the house of reps

Answer 5

The president will appoint a replacement. This happened when Spiro Agnew quit and Nixon replaced him with Gerald Ford.

Answer 6

Yes, the President can replace the VP. But the potential VP must pass through the congress. So it isn't a one way thing.