If he continues to block communication on this subject, write him a letter expressing your feelings, including your expectations for the marriage to hold space for your development. Perhaps your husband is jealous of your success. Or perhaps he is mired in traditional gender role expectations and feels threatened by your emerging power in the community. Tell him you are open to discussing any feelings, but that his behavior is causing you to lose respect for his ability to play fair. Let him know that his behavior is causing you to question whether he has your best interests at heart, which is one dimension of love.
Marriage is a two way street.
Point out the ways you have supported his dreams whether or not he has achieved them. Be open to his feelings and concerns regarding the effect of your running for office on your family, but require a discussion about possible solutions, rather than a power struggle. Be willing to discuss the impact that time involved in your political endeavor would have. Ask him to contribute to problem solving related to your deep desires that need expression at this time. Ask him what he sees as his and the children's needs in the family.