Today's (Wednesday, July 4th) New York Times, includes on page A13 the story "Republican Governor of Michigan Rejects Voter ID Bills". They described Snyder as "a political novice in his first term".

If there is any chance that the legislature can get a 2/3 vote in each chamber to overturn the veto(s), they should proceed. Otherwise, they should work on the governor and quickly pass either or both of them again and make more noise about it. The Governor ought to figure out that if we are required to present picture ID to vote at the polls then the state ought to be able to require presenting picture ID to vote absentee. The Governor shares an affirmative duty with the legislatue and Secretary of State to make sure that people cannot abuse the voting system any more than people who win the lottery should not be able to receive welfare benefits. 

"Snyder said he vetoed the absentee ballot bill, House Bill 5061, because it
would not let an absentee ballot count if the person did not affirm their
citizenship by the close of the polls on an Election Day." In the NY Times article, they quote Sara Wurfel, a spokesman for Snyder as saying that Snyder "suggested that veritifcation of a person's citizenship should be done only once, when a voter is first registered."  Perhaps the legislature can let the Governor understand that the problem is somewhat like some of the problems of the welfare voting rolls which needed to be cleaned up. The voter registration problem is the lack of proof of citizenship when people first registered and that Snyder shares responsibility with the legislature and Secretary of State to give Clerks the tools to make sure that those who are on the voting rolls are qualified.