Question: When did the party that gained control of Congress in the midterm elections in 1946 take control of the government branch that determines the rules of the US House?

Knowledge 1: United States House of Representatives
As of December 2014, the annual salary of each Representative is $174,000. The Speaker of the House and the Majority and Minority Leaders earn more: $223,500 for the Speaker and $193,400 for their party leaders (the same as Senate leaders). A cost - of - living - adjustment (COLA) increase takes effect annually unless Congress votes to not accept it. Congress sets members' salaries; however, the Twenty - seventh Amendment to the United States Constitution prohibits a change in salary (but not COLA) from taking effect until after the next election of the whole House. Representatives are eligible for retirement benefits after serving for five years. Outside pay is limited to 15% of congressional pay, and certain types of income involving a fiduciary responsibility or personal endorsement are prohibited. [SEP] Knowledge 2: Standing Rules of the United States Senate
The Standing Rules of the Senate are the parliamentary procedures adopted by the United States Senate that govern its procedure. The Senate's power to establish rules derives from Article One, Section 5 of the United States Constitution: ``Each House may determine the rules of its proceedings... '' [SEP] Knowledge 3: 1946 United States House of Representatives elections
Truman was Vice President under President Franklin D. Roosevelt and was thrust into the presidency following Roosevelt's death. Truman did not garner the same support as the deceased president. Democrats had controlled Congress since 1931, for 16 years, and Roosevelt had been elected to a record four terms in office. The 1946 election resulted in Republicans picking up 55 seats to win majority control. Joseph William Martin, Jr., Republican of Massachusetts, became Speaker of the House, exchanging places with Sam Rayburn, Democrat of Texas, who became the new Minority Leader. The Democratic defeat was the largest since they were trounced in the 1928 pro-Republican wave that brought Herbert Hoover to power.
Knowledge 1: United States House of Representatives
As of December 2014, the annual salary of each Representative is $174,000. The Speaker of the House and the Majority and Minority Leaders earn more: $223,500 for the Speaker and $193,400 for their party leaders (the same as Senate leaders). A cost - of - living - adjustment (COLA) increase takes effect annually unless Congress votes to not accept it. Congress sets members' salaries; however, the Twenty - seventh Amendment to the United States Constitution prohibits a change in salary (but not COLA) from taking effect until after the next election of the whole House. Representatives are eligible for retirement benefits after serving for five years. Outside pay is limited to 15% of congressional pay, and certain types of income involving a fiduciary responsibility or personal endorsement are prohibited. [SEP] Knowledge 2: Standing Rules of the United States Senate
The Standing Rules of the Senate are the parliamentary procedures adopted by the United States Senate that govern its procedure. The Senate's power to establish rules derives from Article One, Section 5 of the United States Constitution: ``Each House may determine the rules of its proceedings... '' [SEP] Knowledge 3: 2014 United States Senate elections
The Republicans regained the majority of the Senate in the 114th Congress, which started in January 2015; the Republicans had not controlled the Senate since January 2007. They had needed a net gain of at least six seats to obtain a majority. They held all of their seats, and gained nine Democratic - held seats. Republicans defeated five Democratic incumbents:
Knowledge 1: United States House of Representatives
As of December 2014, the annual salary of each Representative is $174,000. The Speaker of the House and the Majority and Minority Leaders earn more: $223,500 for the Speaker and $193,400 for their party leaders (the same as Senate leaders). A cost - of - living - adjustment (COLA) increase takes effect annually unless Congress votes to not accept it. Congress sets members' salaries; however, the Twenty - seventh Amendment to the United States Constitution prohibits a change in salary (but not COLA) from taking effect until after the next election of the whole House. Representatives are eligible for retirement benefits after serving for five years. Outside pay is limited to 15% of congressional pay, and certain types of income involving a fiduciary responsibility or personal endorsement are prohibited. [SEP] Knowledge 2: Standing Rules of the United States Senate
The Standing Rules of the Senate are the parliamentary procedures adopted by the United States Senate that govern its procedure. The Senate's power to establish rules derives from Article One, Section 5 of the United States Constitution: ``Each House may determine the rules of its proceedings... '' [SEP] Knowledge 3: 110th United States Congress
The Democratic Party controlled a majority in both chambers for the first time since the end of the 103rd Congress in 1995. Although the Democrats held fewer than 50 Senate seats, they had an operational majority because the two independent senators caucused with the Democrats for organizational purposes. No Democratic - held seats had fallen to the Republican Party in the 2006 elections. Democrat Nancy Pelosi became the first woman Speaker of the House. The House also received the first Muslim (Keith Ellison) and Buddhist (Hank Johnson and Mazie Hirono) members of Congress.

Answer: January 2015