A centrist
democrat that is more moderate than your typical left-wing
democrat, but not quite conservative enough to be classified as a republican.
Democrats from red states can sometimes be considered "
blue dogs". However, the democrat party of today has moved so far to the left that those who are still closer to the center may also be classified as such.
A blue dog
democrat typically has moderate views. They might support toughening border security, but also support granting amnesty to illegal immigrants already inside the country.
They are often more pro-gun than their
liberal counterparts. Some of them can be pro-life or oppose same-sex marriage. But like most Democrats, they often want to expand education funding, protect funding for government programs, and raise the minimum wage.
The views of a Blue Dog Democrat can vary quite widely (it's possible to have two Blue Dogs that disagree on a lot of things) but in general, they are
liberal to moderate on fiscal and economical issues, and moderate to conservative on social issues.
For example: Dan Lipinski, Collin Peterson, John Bel Edwards, Joe Manchin.