[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/09/02/art.fred.thompson.gi.jpg caption="Fred Thompson said Barack Obama is unprepared to be president."]
ST PAUL (CNN) - Barack Obama is wholly untested and unprepared to be president, former Republican presidential candidate Fred Thompson said Tuesday - the most pointed criticisms yet of the Democratic presidential nominee delivered at the scaled-back GOP convention.
"Democrats present a history making nominee for president," Thompson told the cheering crowd. "History making in that he is the most liberal, most inexperienced nominee to ever run for president.
"Apparently they believe that he would match up well with the history making, Democrat controlled Congress," he continued in the prime-time speech. "History making because it's the least accomplished and most unpopular Congress in our nation's history."
Thompson, who abandoned his own presidential bid after poor showings in the first round of primaries early this year, also criticized the Illinois senator for comments at a recent faith forum during which he declined to say when he believed human life began.
"We need a president who doesn't think that the protection of the unborn or a newly born baby is above his pay grade," Thompson said in what was a clear reference to Obama's comments at a forum sponsored by Rick Warren last month.
Thompson faced criticism during his own presidential run when a YouTube clip of a 1994 Senate debate showed Thompson declaring, "The ultimate decision on abortion should be left with the woman and not the government."
It was also revealed Thompson once lobbied for an abortion-rights group.