Professor Sun Youzhong, the incumbent vice President, Dean of Beijing Foreign Studies University English.

孙有中教授，现任北京外国语大学副校长，教授，博士生导师，英语学院院长。

youdao

So far,the incumbent, President Hamid Karzai has a comfortable lead over his closest challenger, former foreign minister Abdullah Abdullah.

VOA: standard.2009.09.07

Campaigning officially began Saturday in the runoff election between incumbent President Hamid Karzai and top rival, former Foreign Minister Abdullah Abdullah.

VOA: standard.2009.10.24

On the other hand,he says, the world understands the threat posed by incumbent President Mahmoud Ahmadinejad, and that serves Israel's interests.

VOA: standard.2009.06.21

In 1968, for instance, a Minnesota senator, Eugene McCarthy, engaged the incumbent President, Lyndon Johnson.

FORBES: Fact And Comment

The incumbent president hinted that he may leave politics after a 35-year career.

WSJ: Hollande Elected French President

The violence followed the 2007 elections in which the incumbent president was declared the winner despite widespread allegations of vote fraud.

CNN: ICC drops charges against former Kenya official