Finalists for Romney's VP pick heating up

NATIONAL -- The race for who will be Mitt Romney's running-mate in the fall is starting to heat up.

Several names have been floated over the recent weeks over who'll be his choice as vice president.

Among those who's names have come up are: Ohio Senator Rob Portman, former Minnesota Governor Tim Pawlenty, and Congressman Paul Ryan of Wisconsin.

Ryan has said he would slash government spending and change Medicare.

Romney is expected to make the annoucement before the Republican convention.