Title: U.S. ratification of the Convention on the Rights of the Child
Content:  Under the United States Constitution, the ratification of treaties involves several steps. First, the president or his/her/their representative would negotiate, agree and sign a treaty, which would then be submitted to the U.S. Senate for its "advice and consent". At that time the President would explain and interpret all provisions in the treaty. If the Senate approves the treaty with a two-thirds majority, it goes back to the President who can ratify it.
Title: Foreign policy of the United States
Content:  The President sets the tone for all foreign policy. The State Department and all members design and implement all details to the President's policy. The Treaty Clause in Article Two of the United States Constitution dictates that the President of the United States negotiates treaties with other countries or political entities, and signs them. Signed treaties enter into force only if ratified by at least two-thirds (67 members) of the United States Senate. (Technically, the Senate itself does not ratify treaties, it only approves or rejects resolutions of ratification submitted by the Committee on Foreign Relations; if approved, the United States exchanges the instruments of ratification with the foreign power(s)). Between 1789 and 1990, the 
Title: Ratification
Content:  Treaty power is a coordinated effort between the Executive branch and the Senate. The President may form and negotiate, but the treaty must be advised and consented to by a two-thirds vote in the Senate. Only after the Senate approves the treaty can the President ratify it. Once it is ratified, it becomes binding on all the states under the Supremacy Clause. While the House of Representatives does not vote on it at all, the supermajority requirement for the Senate's advice and consent to ratification makes it considerably more difficult to rally enough political support for international treaties. Also, if implementation of the treaty requires the expenditure of funds, the House of Representatives may be able to block or at least impede such implementation by refusing to vote for the appropriation of 
Title: List of treaties unsigned or unratified by the United States
Content:  The Treaty Clause in Article Two of the United States Constitution dictates that the President of the United States negotiates treaties with other countries or political entities, and signs them. Signed treaties enter into force only if ratified by at least two-thirds (67 members) of the United States Senate. (Technically, the Senate itself does not ratify treaties, it only approves or rejects resolutions of ratification submitted by the Committee on Foreign Relations; if approved, the United States exchanges the instruments of ratification with the foreign power(s)). Between 1789 and 1990, the Senate approved more than 1,500 treaties, rejected 21, and 85 treaties were withdrawn because the Senate did not act on them. As of December 2014, 36 treaties signed by the President were awaiting action by the Senate. Among the treaties unsigned or unratified by the United States, a few have been 
Title: Article Two of the United States Constitution
Content:  treaties are by U.S. law official agreements with foreign governments recognized as such only after Senate ratification, the president obviously cannot make treaties unilaterally. However, the president does determine and decide U.S. foreign policy, and can enter into non-binding discussions and give conditional approval to agreements reached with foreign governments subject to Senate ratification at a future date. Additionally, since official treaties are specifically created under and by constitutional U.S. law, and are entered into by both government and the people as a whole, in their capacity as head of state and as the single individual representative of the United States and its citizens, the president 
Title: Treaty Clause
Content:  The Treaty Clause is the second clause of Article II, Section 2 of the United States Constitution that establishes the procedure for ratification of international agreements. It empowers the President of the United States as the primary negotiator of agreements between the United States and other countries, which, upon receiving the advice and consent of a two-thirds supermajority of the Senate, become binding with the force of federal law.
Title: Ratification
Content:  The ratification of international treaties is always accomplished by filing instruments of ratification as provided for in the treaty. In most democracies, the legislature authorizes the government to ratify treaties through standard legislative procedures by passing a bill.
Title: United States Congress
Content:  the Senate to take effect. As a result, presidential arm-twisting of senators can happen before a key vote; for example, President Obama's secretary of state, Hillary Clinton, urged her former senate colleagues to approve a nuclear arms treaty with Russia in 2010. The House of Representatives has no formal role in either the ratification of treaties or the appointment of federal officials, other than in filling a vacancy in the office of the vice president; in such a case, a majority vote in each House is required to confirm a president's nomination of a vice president. In 1803, the Supreme Court established judicial review 
Title: United States and the International Criminal Court
Content:  A treaty becomes part of the municipal law of a nation only when the treaty has been ratified, accepted, or acceded to. In the U.S., the Constitution gives the President power to negotiate treaties under the Treaty Clause of Article Two. The President must then submit a treaty to the Senate for advice and consent for ratification, and the Senate must approve the treaty by a two-thirds majority before it can take effect. The Senate may submit amendments, reservations, or explanations to the President regarding the treaty. Once ratified, treaties are generally self-executing—at least from the perspective of other nations—as the ratifying state fully binds itself to the treaty as a matter of the public international 
Title: United States congressional hearing
Content:  The Senate, as required by the Treaty Clause of the Constitution, must consent to the ratification of treaties negotiated by the executive branch with foreign governments. In October 1999, for example, the Committee on Foreign Relations and the Committee on Armed Services held hearings on the Comprehensive Nuclear Test Ban Treaty. Also that year the Committee on Foreign Relations held hearings on ratifying tax treaties with Estonia, Venezuela, Denmark, and other nations.

Question: who is in charge of ratifying treaties in the us?
Answer: the Executive branch.
the President.
Senate.
the Senate.