As long as you cherrypick "Protestant" to mean "white evangelical theologically conservative Protestant," sure. Do you seriously want me to believe that all of those ELCA Lutherans (Minnesota's full of them, and Minnesota has been Republican since ... oh, never mind), PCUSA Presbys and ECUSA Episcopalians are all conservative Republicans?
And, BTW, if you similarly cherrypick Catholics, you discover that white Catholics who regularly attend Mass vote Republican.
Totally ridiculous and wrong.
There is no "cherry picking" of Catholics, they are a single denomination, all baptized, and counted members of the Catholic denomination, a single church, and history reveals them as a predictable democrat voting block, with 5 to 6 exceptions (depending on sources), only one of those was choosing a republican over an incumbent democrat (1980).
Protestant means all non-Catholic Christians, unbaptized/baptized, church member/non-church member, never having set foot in a church/ church attending, lesbian ministers, gay churches, black churches, Evangelicals, PCUSA Presbys and ECUSA Episcopalians, and so on.
That mass of "Protestant" has voted democrat 3 times in history, 1932, 1936, and 1964.
Even among Hispanics, those who are Protestant are different than Catholics, for instance voting GOP by 56% in 2004, when Catholics only voted GOP by 52%.
In 2008, Obama won the Catholic vote by 54%, but won Hispanics who were Protestant, by only 48%.