Changing the face of the Republican Party? How?

Can someone please explain how the first seven shown are changing the face of the Republican Party? Your comments are welcome below.

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http://www.advocate.com/politics/election/2014/11/04/important-first-republicans-maines-susan-collin...

In An Important First for Republicans, Susan Collins Wins Reelection
No Republican had ever been tested at the polls in a reelection after having supported marriage equality.

Susan Collins won reelection in Maine on Tuesday, according to CNN, and that makes her the first Republican senator to be reelected while supporting marriage equality.

A small number of Republicans have said they back marriage equality — Mark Kirk of Illinois, Rob Portman of Ohio, and Lisa Murkowski of Alaska — but none had yet faced reelection.