WASHINGTON--Obama 2012 Campaign Manager Jim Messina hit Miami Tuesday to prospect major donors, the latest stop on his national tour to line up big fund-raisers needed to bankroll President Obama's bid for a second term.

This follows a Texas swing Messina just wrapped up in Austin and Dallas on Sunday and Monday.

I first disclosed Messina's trips to Chicago, New York, Boston, San Francisco and Los Angeles to huddle with mega donors here on Feb. 2 .... and here on Jan. 29

Messina--often with Rufus Gifford, the DNC Finance chief who will be the Obama 2012 fund-raising director--is first shoring up support with folks who were part of the Obama 2008 finance committee.

DNC professional fund-raisers are giving some 2008 donors--as they did recently in Portland, Oregon when Obama was at Intel Corp.--some access to Obama events to fire them up for 2012.

This comes as Obama has stepped up some of his fund-raising for Democrats, headlining an event for the Democratic Congressional Campaign Committee in Boston on Tuesday.

On Friday, Obama was the draw at receptions at the Fontaineblue Resort and a home to benefit the Democratic Senatorial Campaign Committee and other Florida Democrats.