From the LA Times

WASHINGTON -- Republican officials say Former President George H.W. Bush will endorse John McCain in Texas on Monday.

The endorsement is seen as another sign of McCain's tightening grip on the Republican presidential nomination. The officials spoke on condition of anonymity because the formal announcement is next week.

The Arizona senator has been working to solidify his support from the Republican base. The nod from the former president and patriarch of the Bush family will certainly help.