<P> 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 : </P>
<P> 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 : </P>
when did republicans take control of the senate
when did republicans take control of the senate
January 2015
January 2015