In 2010, several Democrats switched parties bringing the state house under Republican control.
Democrats are switching their party affiliation just to vote for school board candidates in the Republican primary.
Some Democrats have switched parties just for Tuesday's primary.
So many liberal Democrats switched and voted against the amendment.
He started his political career by joining the Liberal Democrats, then switched to Labour in later years.
Democrats who had reluctantly lined up for the measure switched sides, deciding it was not worth supporting a lost cause.
A Democrat, he switched his party in 1990, he says, because he no longer felt at home in it.
Democrats Abroad switched the method of determining convention delegates from a primary to an open caucus in 1992.
In the past, Democrats would occasionally switch parties when they ran for Senate so they could sit with the majority.
In barely a week, Republicans and Democrats have switched places in a striking reversal.