AUSTIN — The red hot issue of illegal immigration likely will get most of the attention during the Texas Republican state convention this weekend in San Antonio as party leaders try to rev up their base for the fall election. With Democrats not fielding a strong lineup and Republican prospects looking shaky across the country, some Texas Republicans worry that GOP activists might lack enthusiasm. "The base is upset with the Republican Party because they thought once the Republican Party had control in Washington and in Texas that things were actually going to happen, and nothing has happened in terms...