President Bush campaigned to move Social Security to a saving-account model.

【翻译】布什总统致力于将社会保障转变为帐户储蓄模式。

1. campaign to do sth. 意为“为做某事开展活动，为做某事组织运动，为做某事发起运动”，或者干脆翻译成“致力于做某事”，又如：

For more than four years he has campaigned to end the conflict in Darfur, in western Sudan. 四年多来，他努力推动结束苏丹西部达尔富地区的冲突。

2. move ...to ... = change ...to ... ： “把......变成，改为......”。例如：

The club has moved its meeting to Saturday, January 22nd. 俱乐部把会议日期改到1月22号，星期六。

He moved from being an extramural tutor to being a lecturer in social history. 他原先是一名校外辅导老师，后成为学校的社会史讲师。