Black Caucus Unhappy with Artur Davis

Letter accuses him of distorting Obama's record and flip-flopping.

Members of the Congressional Black Caucus are accusing former Rep. Artur Davis of "transparent opportunism" ahead of his speech to the Republican National Convention, scheduled for this evening.

Coming four years after the African-American and former Democrat served as a co-chairman of President Barack Obama's campaign, Davis' conversion to the GOP has clearly stung his former colleagues, who sounded off in an open letter released to the media this morning. In 2008, Davis seconded Obama's nomination at the Democratic National Convention in Denver.