Roll Call is reporting that Florida's Senator Mel Martinez has resigned his position as chairman of the Republican National Committee. Chief among the reasons cited is Martinez's championing of immigration reform initiatives. As the GOP has drifted further in to anti-immigrant waters, pro-immigration voices are in the party are being silenced.

Another victim of this trend is Senator Sam Brownback, the Kansas Republican who had one of the most pro-immigrant records in Congress. Brownback heavily emphasized immigration enforcement in his bid to get the Republican nomination for President. But his pro-immigration past plagued him throughout the campaign and yesterday he called it quits. Hopefully, when he returns to the Senate, he will also re-embrace his views on immigration. But I'm hardly optimistic. Only after Republicans take a few beatings in the next few election cycles are they likely to tone down the rhetoric and resume their traditional positions on the issue.