By John Ostapkovich

PHILADELPHIA (CBS) – A census report due out today will likely weaken Pennsylvania’s congressional clout and perhaps make it more difficult for Democrats to be elected.

The bottom line is this: as the population of the US shifts south and west, so do congressional seats.  St. Joe’s history professor and political observer Randall Miller says re-apportionment will probably cost Pennsylvania one seat while some predictions are that Texas will gain four.  Given the Republican edge in the last Pennsylvania election, there’s another facet.

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Miller says, “Re-apportionment not only relates to that loss but it means redrawing the congressional districts, gerrymandering, if you will, which is a fine art going back to the 1790’s and the idea there is that the parties that control redraw districts to benefit themselves.”

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The shift in congressional seats moves the needle on Electoral College muscle in the 2012 presidential vote.

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Reported by John Ostapkovich, KYW Newsradio