(KDKA-TV) Nearly 46,000 Pennsylvania Democrats have switched to Republicans since the beginning of the year.
According to Penn Live, some experts attribute the mass exodus to Donald Trump.
There's even a title for the movement. It's called "Ditch and Switch" and calls for lifelong Democrats to abandon the party, register Republican, and help ensure Trump's place in the general election.
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Professor of Public Affairs at Franklin and Marshall College, Dr. G. Terry Madonna, tells the paper he has a theory behind the switch.
"With the increase in support in exit polls for Trump among working class, blue-collar Democrats, it is my belief that these are people who fall into that genre," said Madonna.
The numbers are similar in other states as well.