إمامة التيمم للمتوضئين
A person with tayammum leading worshippers who have wudu.
When tayammum constitutes valid ritual purity, the imam's purification is not automatically deficient merely because followers have performed wudu. The Hanafi conclusion permits followers who have wudu to pray behind an imam with valid tayammum.
The reasoning depends on the primary premise that tayammum establishes ritual purity. Other rules concerning eligibility for leading prayer form separate legal discussions and should not be conflated with this point.