BostonGlobe.com Political Headlines - May 18, 2012

Here are the top POLITICAL headlines from BostonGlobe.com today:    

Romney catching up in fund-raising with $40.1m month: Political editor Glen Johnson writes about Mitt Romney's fundraising dollars and his continued race against President Obama.       After crossing his name off Mitt Romney's VP list, Tim Pawlenty sounds open to joining GOP ticket: Political correspondent Callum Borchers reports on Tim Pawlenty's MSNBC appearance and his possible change of heart about joining the Republican presidential ticket. Effort to honor Vietnam veterans is sputtering: Washington Bureau reporter Bryan Bender writes about the 50th anniversary of the beginning of US involvement in Vietnam and the few events planned for the Memorial Day weekend.