Shaykh Ahmed Bin Yahya Bin Mohammed An-Najmee said, “This orientation is (of calling to khalifah over caling to twaheed or calling to a calaiphated first and too tawheed second) is erronious, one hundred percent! What did Allah, glorified be He, say to His prophets?:
And verily, We have sent among every Ummah (community, nation) a Messenger (proclaiming): “Worship Allâh (Alone), and avoid (or keep away from) Taghut (all false deities, etc. i.e. do not worship Taghut besides Allah).”
He ordered them with Da’wah to Tawheed! Likewsie, the prophet – may the peace and blessings of Allah be upon him and his family- and his companions- may the pleasure of Allah be upon them- and everyone who followed him in every time and place; likewise they also call (make Da’wah) to Tawheed, to the foundation that this religion stands upon; when the prophet – may the peace and blessings of Allah be upon him and his family- sent Mu’aadh Bin Jabal to Yemen – may Allah be pleased with him- what did he say to him? he said: “Call them (make Da’wah) to the testification that none has the right to be worshipped (in truth) except Allah (Laa Ilaaha Illa-Allah) and that Mohammed is the messenger of Allah, and if they obey you in that, then inform them that Allah has made obligatory upon them to pray five times a day…” to the end of the Hadeeth 
If this is the case, Then Allah has ordered that the Da’wah is towards Tawheed, to the foundation of the religion, and the prophet – may the peace and blessings of Allah be upon him and his family- ordered that Da’wah is towards Tawheed, towards the foundation of the religion
Then, if we were to say: We call to the Caliphate; then we have effectively abandoned the foundations which Allah and his messenger ordered with, and we have come with other foundations. As for the Caliphate, then it ceased a long time ago, and it will again (be established) near the end of time when Allah wills and desires . (Also), we were not commissioned with giving Da’wah to the Caliphate, rather we have been commissioned with giving Da’wah to Tawheed 
He who call’s (makes Da’wah) to the Caliphate has indeed abandoned that which Allah assigned to him, and has (instead) come with that which his Hizb (party, group) had commissioned him with . Allah The Most High said: “Or have they partners with Allâh (false gods), who have instituted for them from the religion that which Allâh has not allowed.” (Ash-Shuraa 21)
Then the Caliphate is for Allah – glorified be He, The Most High- He is the one who wills when it will be established by the one who is from Ahlul-Bayt (the family of the messenger of Allah) – may the peace and blessings of Allah be upon him and his family- and he is Al-Mehdi, the one who will pave the way for the descention of ‘Isa – may peace be upon him. Yes, this is the Caliphate that will come about!
If that is the case, then it (the Caliphate) will come about whenever Allah wishes and not when we wish, and the statement that they are working for its cause, then working for its cause is Baatil (false), and this is a false intention, it is not permissible for them to devote themselves to giving Da’wah for its cause, for they only intend by way of this Da’wah of theirs politics, and they (only) intend the obtainment of the chairs (i.e. political positions), and verily to Allah we do belong, and to Him we shall return
 Al-Bukhaari 1395 and Muslim 19
 Hussein Bin Mansoor Ad-Daghreeree mentioned in his footnote ((the prophetic Caliphate will be thirty years, then Allah will cause a king to come, or will make whom He wills king)) Abu Dawood, Tirmidhee and others
 Shaykh Mohammed Ibraheim Al-Masree mentioned here as a benefit: “and the establishment of the Caliphate is from the fruits of the Da’wah to Tawheed
 Shaykh Mohammed Ibraheim Al-Masree mentioned here as a benefit: “It is incumbent that the foundation for this Caliphate is the same foundation that the Caliphate was built upon the first time around, who is it who is going to establish this Caliphate? Them? The ones voting in parlimentary elections, those that have Democratic ideologies or ideologies that have been affected by Democracy, those that wear the clothes of the westerners and the easterners? Will the Amir Al-Mu’mineen be wearing a suit with a tie? For it is us, the salafies who in reality are heading towards and working on establishing the Caliphate” regarding the one who says that it is obligatory for us now to use our efforts and lay down the foundation for establishing the “rightly guided caliphate”. Is this orientation correct? Or is it erronious?
Posted by Abdul Kareem Ibn Ozzie